Horrible service

I opened an account with multichoice , its paid every month and not owing. I recieve calls every month and threatning messages stating how they will hand me over if i dnt pay, they call u 5 times a day to offer their products though i specifically asked them not to call me as im not intrested in their products anymore. I regret taking credit with them they are the worst company i ever had to deal with, the eveey day calls are annoying and the stuff that does courtesy calls are rude and think they have a right to speak with u howeva they want yet payment has never been missed.