Shocking Service and Protection of Personal Information

I have been a long standing customer of FNB since the 1990s and out of the blue today I get an very strange SMS stating:

FNB :); Dear valued client, a transactional hold has been placed on your account due to FICA failures. Contact *** to submit your outstanding information. ***. FNB a div of FRB Ltd.

I called the number and the consultant assured me this is not a phishing or ****. NOW FNB, let me ask you about customer service - how can you put a transactional hold on a client of over 30 years and that I KNOW FOR A FACT i have submitted all FICA documents and then I must respond to a SMS not even a phone call - CLEARLY you have messed up your systems. I will be going into FNB to close my account.