diff --git a/README.md b/README.md
index 8246368..ba4e1f9 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ A [Telegram bot](https://core.telegram.org/bots/api) that integrates with OpenAI
 - [x] Transcribe audio and video messages using Whisper (may require [ffmpeg](https://ffmpeg.org))
 - [x] Automatic conversation summary to avoid excessive token usage
 - [x] Track token usage per user - by [@AlexHTW](https://github.com/AlexHTW)
-- [x] Get personal token usage statistics and cost per day/month via the `/stats` command - by [@AlexHTW](https://github.com/AlexHTW)
+- [x] Get personal token usage statistics via the `/stats` command - by [@AlexHTW](https://github.com/AlexHTW)
 - [x] User budgets and guest budgets - by [@AlexHTW](https://github.com/AlexHTW)
 - [x] Stream support
 - [x] GPT-4 support
diff --git a/bot/openai_helper.py b/bot/openai_helper.py
index eff21ac..d94ae7e 100644
--- a/bot/openai_helper.py
+++ b/bot/openai_helper.py
@@ -445,24 +445,25 @@ class OpenAIHelper:
         num_tokens += 3  # every reply is primed with <|start|>assistant<|message|>
         return num_tokens
 
-    def get_billing_current_month(self):
-        """Gets billed usage for current month from OpenAI API.
-
-        :return: dollar amount of usage this month
-        """
-        headers = {
-            "Authorization": f"Bearer {openai.api_key}"
-        }
-        # calculate first and last day of current month
-        today = date.today()
-        first_day = date(today.year, today.month, 1)
-        _, last_day_of_month = monthrange(today.year, today.month)
-        last_day = date(today.year, today.month, last_day_of_month)
-        params = {
-            "start_date": first_day,
-            "end_date": last_day
-        }
-        response = requests.get("https://api.openai.com/dashboard/billing/usage", headers=headers, params=params)
-        billing_data = json.loads(response.text)
-        usage_month = billing_data["total_usage"] / 100  # convert cent amount to dollars
-        return usage_month
+    # No longer works as of July 21st 2023, as OpenAI has removed the billing API
+    # def get_billing_current_month(self):
+    #     """Gets billed usage for current month from OpenAI API.
+    #
+    #     :return: dollar amount of usage this month
+    #     """
+    #     headers = {
+    #         "Authorization": f"Bearer {openai.api_key}"
+    #     }
+    #     # calculate first and last day of current month
+    #     today = date.today()
+    #     first_day = date(today.year, today.month, 1)
+    #     _, last_day_of_month = monthrange(today.year, today.month)
+    #     last_day = date(today.year, today.month, last_day_of_month)
+    #     params = {
+    #         "start_date": first_day,
+    #         "end_date": last_day
+    #     }
+    #     response = requests.get("https://api.openai.com/dashboard/billing/usage", headers=headers, params=params)
+    #     billing_data = json.loads(response.text)
+    #     usage_month = billing_data["total_usage"] / 100  # convert cent amount to dollars
+    #     return usage_month
diff --git a/bot/telegram_bot.py b/bot/telegram_bot.py
index 0d4266e..5315c3f 100644
--- a/bot/telegram_bot.py
+++ b/bot/telegram_bot.py
@@ -129,12 +129,13 @@ class ChatGPTTelegramBot:
                 f"{localized_text(budget_period, bot_language)}: "
                 f"${remaining_budget:.2f}.\n"
             )
+        # No longer works as of July 21st 2023, as OpenAI has removed the billing API
         # add OpenAI account information for admin request
-        if is_admin(self.config, user_id):
-            text_budget += (
-                f"{localized_text('stats_openai', bot_language)}"
-                f"{self.openai.get_billing_current_month():.2f}"
-            )
+        # if is_admin(self.config, user_id):
+        #     text_budget += (
+        #         f"{localized_text('stats_openai', bot_language)}"
+        #         f"{self.openai.get_billing_current_month():.2f}"
+        #     )
 
         usage_text = text_current_conversation + text_today + text_month + text_budget
         await update.message.reply_text(usage_text, parse_mode=constants.ParseMode.MARKDOWN)
@@ -371,8 +372,10 @@ class ChatGPTTelegramBot:
 
         if is_group_chat(update):
             trigger_keyword = self.config['group_trigger_keyword']
-            if prompt.lower().startswith(trigger_keyword.lower()):
-                prompt = prompt[len(trigger_keyword):].strip()
+
+            if prompt.lower().startswith(trigger_keyword.lower()) or update.message.text.lower().startswith('/chat'):
+                if prompt.lower().startswith(trigger_keyword.lower()):
+                    prompt = prompt[len(trigger_keyword):].strip()
 
                 if update.message.reply_to_message and \
                         update.message.reply_to_message.text and \