MTN you have seriously messed up!

So, MTN South Africa Why is it that you are deducting double the amount of debit orders for an account,when it is up to date? The account clearly stipulates an amount that is due for payment or debit, then your deductions come through and it is exactly double, with this you have done this twice in a row for two months! AGAIN, the account was fine and up to date before all of this happened, then you change the account to cash, cut the lines off completely so that we have no communication. We've been to your stores several times to sort this out and get told they can not help us, that we need to phone legal, but how must we do this when we aren't even able to call, receive calls, send messages or anything with our phones. You messed up our account with this nonsense of double deductions and then say we owe you a ridiculous amount of money. Do you have preschoolers doing your accounts and maths? How are you managing to do this to your customers? Don't you understand that everybody is going through a crisis at the moment and they have budgeted accordingly to make sure everything is paid and still have money left to provide for themselves and their families and then you swoop in with greed and take more than what is required!? SHAME ON YOU!