bad service

I am very cross with multichoice staff. I bought a single view and phoned in saturday to have same activated. we could not get a signal from the main decoder, and then our main decoder also lost signal. I spent 2 hours on 3 phone calls to multichoice to have same fixed, still no solution, A private technician came out today spent 1 minute and charged me R450.00 call out fee - why because multichoice does not know that there decoders cannot run on same frequency!!!! it is very bad I had to spend R450 because the techinicians that helped me on the 5th of june were unequipped to do so........