Account just got banned please help

It was temp deleted due to followliker settings, they were pretty low as well and the account was tied to my 7yr facebook account (200-300 follow and 300-400 like).
They have given me an option to say there has been a mistake or whatever and there may be a slight possibility I might get it back. How should i proceed, if I say its a mistake what should I tell them next?

As of now my account disabled and no one can see it

please help