You have to be very careful about emails which mention blocked bank accounts.
There is a bunch of scams that go around claiming that your account has been blocked. They sometimes ask you to give them your details directly, relying on your shock at being blocked.
They might even have a link to a fake version of your bank website, so they can get your password details off you and then they have full access to your accounts.
I do a lot of banking online and if someone got access to my account it would be awful. Not that I have all that much money, but still.
Be very careful about any email like this and always go directly to the bank website by typing in the address.