Closure of Account

It brings me such frustration to resort to this platform for a complaint which no one is adhering to , I tried closing my account on the 24th of July as my salary went in on that day , I withdrew funds from the ATM and Teller and advised her of my request to close the account , she advised me to leave R100.00 just for bank charges which I did and proceeded to take my card and did changes with her Supervisor assisting , 3 weeks later I receive an sms advising my account on the negative balance of huge amount , I went to the branch and spoke to Cindy and Gretchen and gave them the slip of the withdrawal and hey advised the TELLER (mind you ) should not have closed the account without the funds being cleared , I don't know your policies , I am sure your staff was supposed to be equipped with this information , I sent an email to the complain and I constantly receive calls from the Contact center advising the same statement over and over , I am saddened, Please get back to me .