IOS11 is messing up my phone and I can't downgrade! NEED HELP!
I really need help, ever since cracking my phone screen and getting it repaired at the local computer shop my phone keeps breaking, it will basically stop charging, drop to 1% charge (can't go over 1% and once it gets 1% it stops charging), and cannot get service.. the phone also starts to get laggier and laggier the longer I leave it in this state (Probably CPU not getting enough power? idk). Anyway this has happened twice now since getting the non-apple certified screen put on (you could do this fine in IOS10). After the second time of this happening I decided to contact the store again (they fixed the phone the first time it happened simply by re-seating the screen, I know, weird), I asked if they could re-seat the phone screen so I could downgrade the phone to IOS10.3.3, which would hopefully fix the issue, catch is I just went to downgrade it and I was told they're no longer signing 10.3.3 sooo what is the best course of action? keep the original cracked screen on till IOS11 comes out with support for third-party screens (I dont think they ever will) or similarly wait until the parts supplier for the local computer repair shop finds a work around for the issue?
P.S. The reason I think this is purposeful is because of a note left on apples most recent update for IOS11 which read "Note: Non-genuine replacement displays may have compromised visual quality and may fail to work correctly. Apple-certified screen repairs are performed by trusted experts who use genuine Apple parts." so yeah basically they want to make more money by only offering repairs from their own sources, which sucks... because that screen repair I just got was $180 :(