Pretty sure it's not possible to get banned from the game, but the game can mark you as a cheater (You'll see the below icon ingame)

If you are marked as a cheater by the game, you will always be placed in division 666 during events, making it near impossible to get good or any rewards (besides participation)

Why division 666 its impossible to get rewards?

Becasue division 666 is the division you get sent to if the game detects you cheating

What if you’re so good, it thinks you’re cheating? Not me though.