Wesbank compaint

I sold my car to a dealership , they settled my account but a refund is due to me now they cannot close my account due to the refund pending , i requested a paid up letter in the meantime waiting for the closure , nothing happened for days on end then i called and the matter has been escelated and promised 3 times by 3 different agents and reference numbers first one was within 48 hours after waiting 48 hours it was promised before the end of that business day and now by the third person also told the same story and the end of the day is now here , the car is already sold to another person and registered on their name it has been 30 days from the day i sold the car and it was settled still no paid up letter no closed account and the next debit order will go off tomorrow