iPad got stuck.

I’ve been using iPad mini 6th gen for about 2 months and nothing happened until now. Today volume and power buttons didn’t work and I started looking for solutions. I tried to restart it via AssistiveTouch. Apple logo appeared but then disappeared. I held the power button down (I don’t know if it actually worked because as I wrote down, it wasn’t working before I tried to restart it.) and then it appeared and disappeared again. I did the same thing over and over again. Suddenly recovery mode became active. I plugged the iPad to my laptop (Windows laptop) and opened iTunes. Downloaded the necessary update file which was about 5,4gb. When it was downloaded I continued and progress screen with a white line and Apple logo appeared. After the progress was over, recovery mode was active again and nothing happened. I tried the same thing again and in the middle of the progress, my laptop gave an error (I’m not really sure what it was about but it was something like “your device is not connected”). I unplugged the iPad from the laptop and iPad screen got stuck in the middle of the progress. I also tried pressing volume buttons quickly and then holding down the power button but nothing happened. What should I do?