Suspension of lines

So I rate MTN 1,but actually they must get 0.For the past months I experienced suspension of services despite payments being made.They sent me a statement but when I phoned their customer service and even go to their shops its a different amount billed.Every 2nd day we must contact them to open the line.This will be my very last contract by MTN.I dont know,but I think people that are working there is *********** to assist their customers!