I need a paid up letter for my account

My lines were disconnected and I emailed mtn to inform them that my lines are not working, bt first I called their stupid 808 number and for hours every day for straight 2 weeks. Mtn kept saying my numbers are active and I stopped paying. You guys handed me over went to an interview and was declined for that. I then called mtn again to make arrangements for payment, made my payment and requested a settlement amount that I paid. Now my bureau details have not been updated. I have been calling mtn to request a paid up letter and I was told im still on arrears, how I dont understand. I was told to call legal department and I have trying to get hold of them . Or the past 2 weeks and im still unable to. Today I have been holding for more than an hour. Like really what is this nonsense?!!!!!