Ios15 beta version touch screen stopped working

Hello, I have downloaded the ios15 beta version, it was working well till yesterday, i had issues with my display and the touch. I have decided to uninstall the beta ios15 and install the 14.7 but it didn't helped. I restarted my phone, but nothing happened. I can't type letters like "a" "q" ( im using the little keyboard you can set) and it makes me mad, because the phone is not even damaged... If anyone had problem like this you could help me or just write something