Volume and Power Button is stuck because of ubreakifix

My galaxy s20 fe volume button some how broke in half and when i went to my nearest phone repair shop (UbreakiFix) the worker said that he'll be able to replace the button for $60, so i said sure and once i got the phone back the power button ( didn't ask to fix ) and the bottom part of the volume felt hard to press, I said it felt hard to press and he said that over time it will be easier to press. Well, that was over a year ago and the button still are hard to press, this happen to cause my phone to constantly freeze and cause the phone to load into this boot launcher thing which never turns off so when ever i go to sleep and wake up the phone is always burning hot because the phone freezes over night. this happens to cause that boot launcher screen to be burned into my screen. Now i decided to go the Samsung store to say what's going on and they said that the guy probably use some superglue to replace the Volume button and the glue might've went into where the power button was. They said they can fix it for $200 dollars! Now I don't know what to do because i cant afford to fix the phone or buy a new one.