AFRICAN BANK IS REFUSING TO CLOSE MY ACCOUNT AND SETTLED 2 MONTHS BACK

African bank is refusing to close my account, I settled my account with them on 23 of march 2018. they said by the 30th of march 2018 I will get my paid up letters, this account still reflects as open by African bank. it is 2 months now still waiting, when I follow up they say systems are not working ,its not me alone 124 people still waiting for theirs and how is that my concern when they were collecting I was not told about 124 people and systems not working only when I need my paid up letter I get stories this is totally disrespectful and rude, spoke to Segomotso Tsotetsi consultant at NRB risk solution on the 22 march 2018. went to African bank branch in Westgate mall on the 22 April 2018 and the account still reflects as open and owing , provided proof of payment and they said they cannot help me. am very inconvenienced by this issue. I even went again last week on the 19 May 2018 after NRB referred me to go to branch if I can not wait any longer but this branch can not help me.