Card Account Blocked

on 2 Oct I purchased some books online from Loot. A voice system from Card Division called me to validate the transactions, which I did. Subsequent transactions at Lifestyle and Woolworths were declined. The Woolworths experience in front of a long queue of people was extremely humiliating. When I phoned they told me that my account was blocked. I spoke to the supervisor of card *****, and to this day nobody has given me an explanation as to why this happened. WHY when I authenticated myself on the transactions, and validated myself to the Card System caller, and I had a balance of R67 289.00 is my account blocked.? I have spoke to Isaak Kekane and Jeanette Masikane asking for an explanation and nothing is forthcoming. I also asked for an explanation from the Director of Card Division and nobody has the courtesy of responding.<br> IS THIS 'THE WAY FORWARD'?