Disgusting service from a 'Teamleader' and ABSA!!!

I SETTLED MY ACCOUNT IN JULY 2015, to my surprise I receive a call from an ABSA call centre agent on the 02/03/2016 advising that I need to update my new details with ABSA, I told the agent that I SETTLED MY PERSONAL LOAN IN JULY 2015, she then advised the account still shows as active on her side and there's still an outstanding balance and provided me with a contact number ***, i then called the number spoke to an agent by the name of Pearl who advised that the account was sent to their ADMIN DEPARTMENT by a team leader Vacen to close the account BUT THE ADMIN DEPARTMENT DID NOT CLOSE THE ACCOUNT!!, i requested to speak to a team leader she transferred the call to FREEDOM HLOPHE WHO HAD AN ATTITUDE asking me how was i inconvenienced when i told him that my credit record might be affected by this as there's still an outstanding balance that reflects, HE SPOKE TO ME AS IF I WAS HIS FREIND SAYING WORDS SUCH AS \ MY BAD\" DID NOT PUT ME ON HOLD WHILE HE SPOKE TO HIS COLLUEAGUE I COULD HEAR HIM LAUGH, HE PROMISED TO SEND ME THE PAID UP LETTER AND AN APPOLOGY LETTER AS I HAVE REQUESTED FOR 1, I HAVE NOT RECEIVED ANYTHING!! POOR SERVICE RECEIVED AND DISRESPECTFULL TEAMLEADER!!!!"