DStv DISAPPOINTMENT

Yesterday, I took my DSTV Exlora 2 in to have it checked out as I have been experiencing a whole bunch of problems over the last three months. I took it in at the multichoice in Port Elizabeth. The problems : whenever I record something, it does either one of the following. The recording plays but within the first 5-10 mins of playback, play either stops or it is as if I am watching something online and have to wait for the buffer. Or, I play the recording and the whole system simply freezes, and reboots itself. Or i press play and the recording does start, but live TV is playing with all the info of the recording i wanted to view. I have contacted customer service multiple times complaining and they advised me to check my signal quality and strength, which i did and according to the consultants signal is good. So, I took a 260km drive just to take the decoder in to have it tested. Yesterday, dstv had the decoder formatted, and recorded something and viewed it. However, when i plugged it in at home and started my new recordings, 5 mins in, it did the same thing!!! Tonight it is giving me a message that says my disc might be *******ed!!! This is nonsense and totally unacceptable! Even box office and catch up does the exact same thing. I have rented a few movies and could not watch them because of this problem, while my account is debited conveniently and on time each and every month. As a loyal and paying customer, I demand a satisfactory solution to this problem and I sincerely hope that DStv Multichoice will provide the solution as soon as possible. I can't have and pay for a service that I don't receive and can't enjoy!!!