Billing

I have been experiencing billing errors with dstv ever since I won a package upgrade in March. I tried to contact them and they always say they will get back to me, I've been waiting since June and now yesterday they debited R968, why is that? Why should I pay for something that I won? Was it a ****? I was supposed to pay R359 every month for 12 months and since May it went up to R429 and now R968. Please explain. This is a pathetic service. You also don't respond to your customers complains as I have been waiting for 2 months for feedback!! Please cancel debit order.