It's not possible to cancle it here.
You can write a cancellation letter and
send it to
Telefonica Germany GmbH & Co OHG
Kundenbetreuung
90345 Nürnberg
or Fax 01805 571766
Hi @3no,
Welcome to our community. It's a pity that you want to leave us. If you can't or don't want to confirm the online cancellation notice by phone, please send us a letter by mail or fax to the address mentioned by @Bollermann. Please be sure to include your customer or phone number, so that our colleagues know which contract you no longer use.
Kind regards
Larissa