Unblocking credit card

My credit card was blocked without FNB notifying me that it had been blocked. This meant I only found out when trying to pay for goods in the shop. Not very good. It has been blocked because FNB required copy of my ID for'know your customer'. I emailed them copy of id informing them it was URGENT that the card be unblocked. No feedback from FNB. I then tried to phone the KYC centre and was told 'sorry they don't have a telephone number - you just have to wait' This is very poor service