Over billed for 2 months!!!

I swapped out my new decoder for an old one that I had because of damage during a power surge. I contacted the call center and had the old one activated and the new deactivated. This is for my extra view. For the last 2 months I have been over billed at R936. I called the call center many times to report this. The agent informed me that she acknowledges the problem and she is sorry that I was over billed in July and will rectify. I was supposed to be credited and only pay approx. R600 for August. <br> In August Multichoice has billed me R936 again. This time round when I called the call center I was on hold for 45 mins without answer (3 occasions). I even left a messages for a call back and have still not had a response / acknowledgement from Multichoice (Email or telephone call)<br> <br> The irritating part was when i got through the call center previously I always left an excellent rating for the staff that I assumed sorted out the problem. Very Disappointed since I have been a loyal customer of Multichoice for many years.