FNB Disabled Credit Cards

Suddenly my credit card is declined!! Since I don't use the FNB App - FNB apparently have proof they communicated with me to update my details. They have no idea though, how they sent me those notifications. I had to phone the bank. Eventually they guided me on online banking, to what they wanted updated. Then they re-opened my bank cards. Not very helpful at all!! FNB you need to communicate properly with your clients via correct channels.