Can Debits Can You Have Your Bank Block Electronic Debits From Your Savings Account?

Can you have your bank block electronic debits from your savings account? - can debits

I have a big problem. My roommate used my account to an online order with the address of the debit card to make my savings account. I'm not friends with him anymore, but I wonder if I can call my bank, a sort of block to electronic debits, make no money from my savings account. Thank you.