Good morning! I'm sorry to hear that you're having trouble with your Poco M3 Pro 5G. Based on what you've described, it sounds like there may be an issue with the phone's software.
One alternative solution you could try is to flash the official firmware for your device. This can be done using a tool like Xiaomi Flash Tool. Here are the steps to follow:
1. Download the official firmware for your device from a reliable source.
2. Install Xiaomi Flash Tool on your computer.
3. Put your phone into fastboot mode by turning it off, then holding down the Volume Down and Power buttons simultaneously until the fastboot logo appears.
4. Connect your phone to your computer via USB cable.
5. Open Xiaomi Flash Tool and select the firmware you downloaded.
6. Click the "Flash" button to start the flashing process.
Note: This process will erase all data on your device, so make sure to back up any important files beforehand.
If this doesn't work, you may need to seek assistance from a professional technician or contact Xiaomi's support team for further troubleshooting.