FNB Freezes account without notification & consent

After more than 16 years of banking with First National Bank, this is the first time they've disappointed me, and now i regret praising them ans telling everyone what a great bank they are because as it turns out they just pathetic as the rest of their competitors.<br> <br> on saturday funds was transferred to my platinum cheque account, i went to the ATM to withdraw a small amount and found transaction failed, the little slip came out of the ATM stating my account is frozen, this has never ever happened to me before, the reason why i'm upset is : 1. FNB hasn't warned me, notified me, or asked my consent even though i have multiple communication channels with them, there's \my connect"i receive these on my banking app"