How to Temporarily lock my Deutsch Account?

I am an international student studying in Germany, but currently doing an Erasmus in Budapest. While I'm here, a thief broke into the basement of my friend's apartment who was holding some luggage for me in Germany.

In that luggage, I had a document that had a file of my bank account details in Deutsche Bank. I know that transfers can be done only after the photoTAN Verification, as I have activated online banking. But I want to know that is there a way to temporary lock my Deutsch Bank Account from the app, just for safety.

The document would probably have IBAN, Account No., BIC, E-Mail addresss, home address etc. but not the PIN of Debit and Giro cards.

Please help.