Opel Astra 2012: Bluetooth Issue with Opel Astra Sports Tourer Radio

Hello everyone,
I have a question regarding an issue I've encountered with the radio in my Opel Astra Sports Tourer. The system works well, but I'm facing a problem with the Bluetooth feature. The Bluetooth connects to my phone, but I can only use it for calls; I can't play music through it.

I’ve tried some basic troubleshooting steps, such as:

1. **Checking Bluetooth Settings:** I ensured that the settings allow for music playback.
2. **Device Compatibility:** I confirmed that my phone is compatible with the car's Bluetooth system.
3. **Software Update:** I looked for any available updates for the radio system.
4. **Reconnecting:** I disconnected the phone from the radio and then reconnected it.

Despite these efforts, nothing seems to work. If anyone here has experienced a similar issue or has any tips on how to resolve this problem, I would greatly appreciate your help!

Thank you in advance!