Cancel DSL-contract with no binding

Hi O2.



I want to cancel my DSL-contract. There is no binding (Ohne Vertragsbindung - 4 Wochen zum Monatsende kündbar).


Is there a form to fill out?
Can I submit this by e-mail?


Best regards Trond Hugo



KUNDENNUMMER: DE13726735
RUFNUMMER: 030 49087300