You should have got an "Account review notice" and an "Important Service Update" email from them that says you have 90 days to transfer your funds out. After that your account would be locked.

I got my funds back within that period.

Now of course, it's questionable whether it's right to just lock up peoples' money after a self imposed time limit without their consent - even though it's for regulatory reasons. But that's not the same as them arbitrarily locking up your money.