Freezing accounts without warning and no reason from your private banker

We just had a great experience with FNB, that my wife's accounts with FNB were frozen for apparently none tax compliance. Without any warning, without any contact from the private banker. If that is what you get as a private client it is pretty bad. Not sure why we pay so much per month Especially since we had just intense discussion to move all bonds to FNB, especially when we just receive tax back. And FNB concludes that my wife is not tax compliance — really????