Q: IOS 10 screws up my iPhone

Hello, I have installed the IOS 10 update three days ago on my iPhone 6s, and my phone has been acting out ever since. The music plays by itself, sometimes at an accelerated speed, Voice Control always pops up on my screen (Siri does the same as I tried to have her take over Voice Control), calls inexplicably drop (voice call, Whatsapp and FaceTime), the screen goes black for a few seconds, all this when I don't even touch my phone (except for when I'm actively calling someone). The battery is also draining out in a matter of hours even when I don't use my phone (I'm aware of apps running, but still). I have tried to do some research on the internet but all websites indicate that the IOS 10 issues have bene fixed by now, which clearly isn't my case. My phone was perfectly fine before this update, and I rebooted it many times since the update. I have also tried to connect my phone to my MacBook pro to operate some kind of magic with an update, but to no avail. Could anybody help and tell me how to fix those issues? Thanks!