To cancel direct debit, delete bank information, and return leftover funds in wallet

Are you a prepaid or postpaid customer?

I have a prepaid sim

https://info.o2online.de/kuendigung/

https://www.o2online.de/assets/blobs/pdfs/prepaid-guthabenauszahlung/

Hello ​@11012601_FK,

welcome to our o2 Community 🙂

Yes, via the first link you can cancel your contact online - the firs field with “Kundennummer” you can leave empty, as for Prepaid there is no Kundenummer, only the Rufnummer in the yellow field:

With the second you can start the refund 🙂

Best Regards,

Gerrit