DSTV suspended but paid

Last week I wrote a report stating that my DSTV gets suspended every three days. On Monday 25 May I received an apology from dstv and between Monday and today my dstv was switched off twice already. They cost me money in phone calls to them and they have all the proof of payment which I now e-mail to them just to make sure they do in fact have it all. it does not help apologising - fix the problem. I am not going to pay any extra money if I have already paid our monthly installment.