SNEAKY AFRICAN BANK

On the 7th of February 2018 I was provided with settlement figures by an employee of African Bank - Ria Hattingh who advised the figures were valid for a period of 6 working days being the 15th February 2018. I attend to payment of all outstanding accounts by the 12th February 2018. Proof of payment was sent through to Ms. Hattingh and paid up letters requested. I telephoned the call center on 9 March 2018 to get the letters and were advised that my query would be attended to and sorted out within 48 hours. Today I received an sms stating that the accounts were not paid up and monies are still owing. How can this be when I paid according to what was sent, surely they cannot change their minds now.