inconveniencing your clients!!!

I have not even been a FNB client for a week and I have already had to deal with your CRAZY processes. I opened an FNB account last week, provided all my details and went to the branch to do FICA. I requested to be registered for Online banking and I was informed that I could do it myself Online. I thought wow FNB is awesome!!!!. I filled out all the required information and set my current cellphone number as my number for OPT etc. so I get my OTP's and all is great. I try to log in now and FNB has conveniently changed my number to a number that I have NEVER given them, a number that I have not used in over 6-8 years. So I call there call centre, go through the verification process which I thought was brilliant, and asked to change this number. The lady asked me what the number was, REALLY!!!! HOW AM I SUPPOSED TO KNOW A NUMBER I HAVE NOT USED OR EVER GIVEN YOU!!!! no so this is not the part that ****es me off. NOW THEY CANT HELP ME AND I NEED TO GO TO THE BRANCH TO CHANGE A NUMBER I NEVER GAVE YOU. WOW!!!! I am livid! I am not going to a branch to change a number you choose to use without my consent. if you cant fix this then close this account!!!