Microphone not working | iPhone 7

So this question got asked a few times already, but my iPhone 7 is not able to do any calls. The Voice Memo App is not allowing to test the microphone, and Siri doesnt work either.

Tried to reset the device and configurate it as a new iPhone, made it work for about 5 minutes, then the microphone stopped working again.

IT IS NOT A HARDWARE PROBLEM DEAR GENIUS BAR. It came with IOS 13.2.

Also did a DFU mode reset, didnt fix anything.

After the DFU mode reset, when i tried setting up Siri it told me to unplug the Bluetooth devices (not possible, Bluetooth always deactivated).

Hoping for a solution, or a soon software update with a fix, because its not in the warranty anymore and i wont pay for a hardware repair.