Worse service provider ever

I signed up for a month to month contract with rain. After a few months they sent me 2 sim cards to use with 2 additional devices. Sims did not work after calling Rain and Constantly getting cut off, I canceled with Rain, the very next day I get a call to apologize and told this been taken up with a supervisor and should be resolved. Never heard from them again. Eventually my credit card expired and after various emails to them asking why they still deducting after I canceled then last month some how they got my banking details and debit my account for over R3000 and I called and sent various emails to ask why if it has been canceled and no response from them.