DELAY - REFUND FROM AFRICAN BANK

I was not suppose to even rate African bank at all, I'm so disgusted with their service, 3rd May 2021 I've settled my loan exactly the settlement amount I received the same day, 4th May I received my paid up letter, account closed, tracers and finance dept. informed to prevent debit order. Boom 25 May they debited, I called the 26 May , they picked it up from their system and promised to refund within 72hours but no refund. 1st June follow up after receiving nothing but still no help, today 2nd June I'm told I still owe a R1000....Duduzile couldn't answer my questions regarding this , as usual the matter was escalated to the supervisor. I AM REALLY ****ED WITH THIS KIND OF SERVICE. I WANT MY REFUND!!!!!!!!