*********** ***** department blocking my cards resulting in me not being able to purchase a car

Friday I received a notification of a login on my personal account and wanted to confirm where it came from. I called the ***** line and after explaining my situation on my personal account to Nthabileng she transferred me to BUSINESS, busiess then transferred me to faud and I again Nthabileng answered. I asked to speak to her supervisor and Eslie came to the phone. I told her about the notification and she suggested to bloeck my online profile and all my cards and ensured me that I could visit the branch and everything could be unblocked. I asked more than once whether I would be able to make a purchase on Monday and she confirmed that I would. I repetitively confirmed and told her that I need to make a big purchase on Monday and she said that I would. At the branch they told em that I would have to wait 7 days for my credit card and I would NOT be able to make a purchase. I need to buy a car, and now because of your staff's advice, I am unable to do so as it will not be available.

Your ***** department - Lloyd called me on Sat 1 Nov while I was at the branch and informed me that there is no way for me to find out who logged into my accoutn on Friday at 14:33. HOW is this possible that my bank cannot tell me who logged into my account???