MTN / Reloactiong payments

My husband and I have log a query in May already with regards to payment allocations. Today I was informed "Please read the initial response that states ' Note that the banking department currently has a backlog in allocating payments therefore allocation of these payments will be delayed ' with so many tickets log just to be informed today of this "backlog". In the mean time, my account is in a arrears and it prohibit me to do my upgrade. I have to put arrangements in place so that MTN could not suspend my lines every month. Although I've ask for balances due taking allocated monies into consideration, I think that I am not in arrears, all the balances given to my is different from each other. What should I do. It is almost August, my new invoice is about to be ad on to my new statement and its just adding up. I am paying my account, but they just seem to resolve my matter