Incorrect billing

Good day MTN South,

Kindly advise your customers when you overbill them. It is very unfair that you decide to put the money into the next billing without consulting them. I was overbilled on my account and when I called the customer service they advised that the money will be added the following month on my account. I never concerned to this and I have bills to pay. Then I was told that this needs to go through different approvals for my money to be paid back. Can you please put in the same steps when you are overbilling us so that the correct amounts are billed. Please note that some of us have been unemployed due to the pandemic we rely on this money to survive.