Worst after sales service

I closed my my cheque account in 2016, which had a an overdraft balance on. This has beeb settled years ago. Since the beginning of this month I have been calling the card department that has logged queries upon queries. I have send mails as the consultant requested and marked it urgent. Last week and Thursday I spoke to a gentleman the Hlobisi. he apologised for ghe bad service I received as he noticed that my query was send to someone that has not been working for the last 14 days. He promised that he will call me by today, to update me, and to tell me that he is sending the paid up letter, or letter of account closure. I called in today, not get hold of him, they told me that they will him a message asking him to call me by close of business today. I call in again just after 4pm to be tols that he logged of tge system at 4pm. Again I was told that the query will be escalated and there a 2 day turn aroind time. It has been a week since I requested the letter and still no one assisted me. I hope by sending this review, someone wiill be able to assist me, as the consultants that I spoke for the last week has not been of any assistance to resolve my request, all but empty promises.