High @Brar 

You should definitely cancel the subscription and observe the objection period of 8 weeks for invoices.

 You can try to manage or cancel subscriptions yourself here:

To do this, the cell phone number under which the subscription runs must be registered and you must do so here

http://www.o2online.de/entertainment/wallet

be logged in. This applies to every single number.

In any case

 Set a third-party block (only applies to new subscriptions) so that it doesn't happen again.

You have to register each cell phone number separately and log in with it, otherwise the third-party blocking may not be fully effective

 https://hilfe.o2online.de/datenautomatik-drittprovidersperre-40/o2-kunden-koennen-drittunternehmendienste-selbst-verwalten-und-per-handyrechnung-bezahlen-235883

 Dispute the invoices within 8 weeks

 please request a refund with reasons.

https://www.o2online.de/service/kontaktformular

Greetings

Hello @Brar ,

welcome to the o2 Community .

I’ve just checked your contracts with us and from what I can see the package has already been cancelled. I’ve entered a refund for the past two months that you should be receiving with the next bill then.

Kind regards, Sven