angry customer

If there was a rating of 0 I would have given them....My mom used to have a contract by you and apparently there was a penalty of R720 she needed to pay and she did in March via the ATM using the FNB acc. .. Recently they called her saying she must pay the acc and they insisting on proof of payment and she doesn't have it because why did they wait so long for the slip? because she doesn't have the slip its been almost 7months am sure the slip would have faded as well by now. She even asked them to close the acc but still to no avail