Terrible service received

In March I phone to upgrade to the R899 package. I paid the additional R149 immediately. In April I was debited with R1275 not the agreed R899. When I phoned DSTV to obtain a explanation I received really bad service, when asked to be put through to a manager I was put on hold for 15 minutes and then the call was cut. Still have not receive a proper explanation why I was debited with an addition R376 and why the terms and conditions was not explained to me properly. I should have never upgraded to the R899 package. Worst company in SA as they do not believe that they have to adhere to the customer protection act.