Unhappy

I have been trying to get my decoder to work for almost 3 months now. My decoder was tested at a walk in centre where they determined that the power cable was faulty. Today I bought the power cable however the decider still won't work. I decided to the call again. A very impatient lady answered my call telling me to hurriedly try this and that . The call then cut. She didn't call me back. I'm not sure if she assumed that since the call cut then my problem disappeared. Oh..she told me to go to the walk in centre again. The walk in centre that I asked to change my troubling decoder but told me to pay a certain amount of money for that to happen irrespective of me having insurance. I work 6 days a week and cannot be running up and down to DStv walk in centres. I really regret having any business with you guys.