Terrible service and rude consultant

I contacted FNB last year around October requesting them to close my FNB business account because I am nolonger utilising it. They did not close it now my account is having a negative balance. A rude guy whom I spoke to today told me that they sent me an email on the 16th of October 2021 requesting an account number so that they can transfer money that I had in my account. I asked him they did not call because they are able to call when they are selling their products. He dropped the call on my ear.