Rain Stole my money!

I ordered 2 Rain modems last year in July. I cancelled the services in August, simply because it did not work even though I am less than 200 m away from the tower. Rain, however, continued taking R2000 every month thereafter from my account, and the only way I could stop it was to get new bank cards. I have given up phoning and trying to get repaid, as every time it is the same story, it will be escalated, to the repayment dept, which they apparently cannot transfer me to, yet never happened. This is theft! I am worried that it is not prepared soon, that if I go their office, I will get arrested for ******!