Worse service ever

I've been struggling for more than a year to get my billing right because every month DSTV request an extra amount of money (which always varies on top of my current account. This month of February they imp**** that my EFT "bounced" and that it eas reversed. I send them proof of my payment as well as my bank statements to inficate that nothing was reversed and still they claim another R1000 outstanding. This is unacceptable and I have had it. Every month is a struggle with them and they never come back to you to resolve the problem. I can't take the incompetence any longer.