Worst property sale to an ABSA customer. I'm glad I'm not their customer.

I have sold my property to a client of ABSA and ABSA issued a payment guarantee for Madibeng Municipality on 14 April 2022 to confirm that they will pay the rates clearance fees at Madibeng. The property was transferred on 02 May 2022 and they took a portion of my money (proceeds of the sale) to pay Madibeng Municipality. A payment they guaranteed will be made on the 02 May 2022. Today, 30 September 2022, they still never paid the Municipality (according to the municipality) and they are charging interest on the outstanding amount and threatening to send me to their collections department. I have contacted the bond attorneys used by ABSA and ABSA home loans to send me proof of payment if they indeed made payment since August but my requests were blatantly ignored.