Unable to help with errors

I'm always having bad experience with multi choice, whenever I call for assistance they tell me they are unable to assist me they only dealing with (E) errors and I need to call a DSTV installer. Today I called them again telling them I've got an error on my screen it displays ( connection to signal is lost) they tell me to call an installer not bearing in mind that installers don't come for free and we rely on multi choice for assistance. Sometimes when you call the installer they tell u it's the multi choice issue. These consultants just have the bad service I dont know if it's bad service or some of them don't know how to do their jobs.