Breach of Agreement and Over Pricing

I am extremely appalled and disappointed with the lack of accuracy and attention to detail from DStv. I was debited almost R100 more with no explanation whatsoever. When I called the call centre I was told that it is forward billing and I was debited for the following month in advance. This is a breach of my price lock plan firstly. It is also an *********** mistake that DStv did not even pick up and apologise for. Instead I was told to reverse the debit order and repay. This is time consuming and I will then incur unnecessary bank costs meaning DStv intends for me to loose more money. I would like my money refunded as I am on a price lock fixed contract and did not sign up to be debited extra under any circumstances whatsoever.