New month, same terrible service

Knowing that my debit order from Cell C will bounce I went into a Cell C store ( Norwood Mall) to make a manual payment. I was told this would need to be done at Pick n Pay or Nedbank which was fine. I asked for the entire amount that I owed and the lady there printed out an invoice for me. I asked her 4 separate times if the amount reflecting is the entire amount that I owe and she confirmed all 4 times that the amount on the invoice is definitely all I owe. I went to Pick n Pay immediately to make the payment. I then receive an sms this morning from Cell C advising my line is going to be cut off due to a short payment!!! I called into the call centre and was told that even though the mistake was from Cell C my line is still going to be cut off. The lady I spoke to was rude and pretty much said that Cell C don't care that they made a mistake!