Why is ABSA messing with my Credit Card Facility????????

I have been an ABSA client for years. Always had a credit card which is not only paid up but where all my money is stored. I used my card twice last week with no issues. 10 minutes later my credit card cannot be used at the stores. Not available must use savings or cheque account. I put all my money in my CREDIT CARD for a reason. Now I look like a fool becasue I cant pay with my credit card and I no longer have money to pay with in my savings account. When I phone the credit card helpline, I hold on for 11 minutes just for it to be answered abruptly by someone cleardly irriable at 9am already. Just to be told "I cant do anything from this side go to a branch and check if it is still linked". I never asked for it to be delinked! I don't have an ABSA branch near me presently! Surely the call centre can check is accounts have been delinked?