Not an in depth hacker here that knows how to do the backing, but I can give you info about overwatch and how the system works:
1.so since youve been banned by overwatch it means your account has been reported multible times by people in game, from my personal feeling that tells me you need to be more suble with your hacking, probably you used an aimbot/ triggerbot/wallhack too much/ to obviously.
2.In the overwatch process what happened next was a comp game from your record was randomly chosen and sent to up to 5-10 overwatch people in game. Of those 5-10 people more then half chose (this is the dumbed down choice) "yes this is a hacker"
3. You were either perma/ or temp banned from the overwatch community, if its a temp ban I recommend not using your hacks for a few weeks, mostly I'd recommend uninstalling them, then re-install them a week from now. and report on the thread that you were detected.