The three pieces of information are: bank account number, my mobile phone number used for online banking and my address associated with my bank account. I am in Germany.
Aside from the fact that you could now get spam calls and mailings, nothing negative at all. With your account number, anyone can send you money (which you probably wouldn't mind), but otherwise, no access is possible.
In Germany, every company and many people publish their account number, so they can receive payment. Every invoice contains address, phone number, and account numbers of the company that bills you, so you are able to send them money to pay the invoice.
Nobody can access the money or details of your account with only the name and number; it needs your online login user id and password, or your (government issued) ID to do so. You don't need to worry at all.