they over billed my account then suspended

I complained several times here about mtn over charging my account, they keep on replying here but don't contact me personally. They promised me to that they will fix the problem but never did rather they suspended my account yet I don't owe them a cent,when I call 808 they tell me they won't open my account until they correct my account. So now I'm suffering for the problems that were caused by them,im really ****ed off by this ****************!