Double debit no refund no statement

DSTV have failed to resolve my problems for almost a month now and to add insult to injury, they have debited my account of R2001.10. Firstly i kept getting disconnected and having to call them regularly to resolve this. My previous decoder was the one on the system and therefore my service was suspended on the Explora that i connected. Then they debit me and insist they have ONLY debited R1900 odd even after I send proof of the debit. Now i can not get anyone to send me a statement showing what it is that i am being billed for and noone to address the refund process. No responses to my mail. No senior DSTV employee to rectify their error. Numerous emails numerous calls. Highly unprofessional and unacceptable.