dstv not working

This morning my Dstv worked perfectly. This evening I get home and nothing is working. I phone the call centre. What an absolute waste of time. They claim that there is something wrong with my installation. That is impossible as the service was working perfectly fine this morning. To top it all. I am told to take the decoder to an agency. Why should the customer be inconvenienced because you don't know what is wrong with your product. If this is not resolved within 24 hours. Im cancelling this service. Absolutely ridiculous service.