My iPhone6 has been hacked!

Is there anything I can do to reset my phone? I have already re-set my password via iCloud on my Computer-not my phone. If I have to take phone in to Apple Store, I will if they are open??

Any help would be appreciated. Thank you community

P.S.

My phone is inoperable at this point and seems to have a mind of its own. You can see someone or something is typing and opening different windows, ring tones are going off, visually can see typing or texting, etc. It's as though someone is purposely messing with my phone and I cannot control my own phone! I have to shut it off completely (Shut Down).