a Year Later

Last year we paid up our personal loan with Nedbank, the settlement letter was valid until the 10/04/2019, we made full payment on the 05/04/2019. We also phone them to tell them we made fulle payment email them the proof as well and told them to close the account it is on recording, on Tuesday 21/01/2020 I received a statement from Nedbank that I owe money just over a R1000, so I phone Nedbank the lady on the phoned told me it is because we didn't close the account so I told her they need to go back to the recording and listen we did close the account, now this a Year later they come up with this story of still owing money after full settlement was made.