Bad Service offered by Foschini Group - Account Blocked and i was not informed

I have been a loyal Markham customer for 12 years, On the 23 December 2017 I was at Total Sports and ready to buy sneakers using my account and sadly i was informed by the cashier that my account has been blocked and I was shocked cause my account was not in arrears. One of the staff @ Total Sports phoned the Head office to find out why the account was blocked and she was informed that my account has been cloned hence it was blocked. My frustration was that no one from Foschini group bothered to phone me before to notify me that my account has been blocked. I was informed that I can only make a purchase if i produce my 3 month bank statement and pay slip, i feel i should have been informed in advanced that my account has been blocked to avoid being embarrassed and inconvenienced. This was a high level of bad service being unable to use my account to buy sneakers, personally i feel that someone did not do their job to ensure I was contacted in advance to warn me about my card being blocked and whats worse is when I told the Head Office staff that Foschini Group must never open my account again and will gladly pay the outstanding balance of R1000 and Foschini has lost me as a customer she was not bothered at all with my comment. I have destroyed my card and will never buy anything from Foschini Group due to the bad service experienced and and being embarrassed at the till point.