Earlier quoted context omitted.
Did they give any explanation as to why they think that's legal, freezing accounts and blocking payments on a whim, without some court's decision?
AML/KYC laws require you to freeze accounts if you suspect anything. Traditional banks blocked my transfers a few times and required proof of source.
I know they're supposed to alert the authorities on suspicious activity, but I believe(d) freezing an account unilaterally is the ultima ratio for extreme cases and wouldn't be done easily, as it will leave the bank open for damages claims, and really makes banks somewhat useless if it happens frequently.