Standard Bank - Vetting systems inaccurate

I just ii had a very frustrating engagement with stanard bank secure code as my card declined at a retailer. I have sufficient funds available however when I phoned in to enquire what the issue is, I was asked 5 questions of which one was related to a company that according to my records is deregistered and when asked if I was a director I said no as it was deregistered . The system however says that it is still registered so then they said when was it registered. I said that I wasn’t sure as it was approximately 10-15 years ago. My frustration is the fact that I was standing outside the retailer and the consultant continued to question this one question . I asked the consultant for another question and he said he couldn’t,

My point is all I wanted to know was if there was a problem on my card as no suspicious transactions had happened. I now cannot transact. I question the system that is being used and in my case it is not accurate and not acceptable that I cannot access my account.