Incorrect Billing

On the1st on November I called Multichoice to change debit order dates from the 25th to the 1st of everymonth. I had just made payment on this day. Later that same day i received an sms saying I will need to pay R114.00 on the 25th of November I assumed this will cover the 5days before the 1st. This morning I received an sms saying I need to pay R702.00 I then called the Customer Center in PE spoke to a Philile Ngubane who could not explain if the R702.00 will cover from today to the 1st of January since the 1st of December is yet to come. She told me no it seems theres duplicate billing in my account amd the Debit order for the 1st was not on the system. It still reflects as the 25th hense my service is disconnected. First of all DSTV has never disconnected a service with in 24 hours of non payment at least they used to take 48-72 hours. Anyway she did what she did on her side and told me a payment of R539.00 was required and my debit order date remains the 25th. When I got to the retail outlet where I was about to make payment, I learnt that I owe R999 and i called PE again spoke to a Bayanda who put me in hold for over 20 minutes up until i hang up. He then called 40 minutes later saying he was going to put me through his team leader again put me onhold forever and never return to me. He told me I had balance brought forward of R190, I asked him brought forward from where because I am not on contract I just have a debit order with Multichoice. By this time i owed DSTV R1020. I sent a msg to *** got a reference number. Its been over 3hours since I sent an email and there has not been any response.After not getting anyhelp from their service center. My question is, Is Multichoice exploiting customers because they know they are the only ones broadcasting the World cup? The sad thing is that if I share this with anyone I work with they'll say why do you think we discontinued DSTV and we have Wifi and stream what and when we like. My id no is *** and my contact number is 079o686490. Just incase there is someone actually working at Multichoice today.