Commerzbank wants to charge monthly fee,

Hello everyone, I’m a student with no income and I’ve been using Girokonto of Commerzbank without fee for a while.

Today I received a letter stating that I’ll be charged 4.90 euro per month and they require my agreement. What will happen if I don‘t response with an agreement? Will the fee be automatically applied, or will they block my account?

If I don’t want to be charged, shall I cancel my account soon? I’m not good at german and I used translating app for this, please let me know if I get anything wrong.