When sending a Proof of Payment twice still gets interest charged...

8 Jan 2018 - Submit Transfer of Ownership letter including Proof of Payment for transfer fee in one document. Feb 2018 - Ownership Transferred 9 May 2018 - Receive Statement indicating R290 transfer ownership fee outstanding 9 May 2018 - Phoned Flexi Club, and were then requested to re-send the document (which was used to do the transfer as the POP was part of the same document) 13 June 2018 - Receive a statement still indicating R290 transfer of ownership fee outstanding that has also gained interest in the interim.