pathetic service and network

i have been an mtn client for over 10 years, i pay a substantial amount, last month i my lines were cut, i asked why as i pay my bill every month on the 28th or 29th manually via eft, i was told im 60days in arrears for a tiny amount, so i made arrangement and paid in R1700 on 28th nov, now again my lines are cut without warning, on call for 1 hr and no answer from the bad customer service line, i am in business and i cannot make a call, i am done with MTN, contracts will be cancelled, i had enough of this *******