Faulty decoder

To start with, DSTV if you are training your employees to be RUDE and SARCASTIC well then you are doing a great job. I went this morning to HENBERG Vaalpark with my faulty decoder, only to arrive there and be assisted by a very rude and sarcastic lady. She took my decoder and plugged it in only to reveal that once again my power supply is faulty for the third time in 10 months. Each time I have to take off from work and travel to HENBERG to find out my power supply is faulty and each time I have to buy a new power supply as they refuse to test nor exchange the faulty decoder even though I am paying for insurance on two decoders. Each time it is costing me R550,00: R180.00 for a new power supply + Travel Cost + one hour off from work each time, I could have actually bought a DSTV Explorer with all the money I have already lost however DSTV Dont give a Damn about their Customers. They will rather protect a Rude and Sarcastic person than to assist their customers. Is it fair towards me as a customer to loose R550.00 each and every five months. Why don't they test the decoder and fix it, why do we pay insurance each and every month for NO service. Is there any person decent enough to help and assist me, or will this complaint also just be in vain.