Good morning @sandforce 
It's great that you've come to us with your request 

But it's a shame that you've canceled your contract with us. I have just checked with you and can confirm that the fee is a compensation for the router that was not returned.

I apologize that the router was charged even though you had already sent it back to us.

Do you have the shipment number / RET order number for us? I would be happy to ask you for this in a private message so that I can forward your complaint.
Kind regards

Kathi

Dear Kathi,

Thanks for your answer. I have the RET order number but unfortunately I cannot send you a private message at the moment as the system tells me that ‘the user only can get messages from the ones who’s followed by the user’.

Kind regards,
Safa

Great, thanks for your help  @sandforce 

I have just sent you a personal message from the o2_support account where you are welcome to reply 

Best regards

Kathi

Good morning @sandforce 
Thank you for mentioning the RET number, I have now forwarded your complaint for calculation.

The check will take a few days but you will then (if everything fits) receive a refund from us.

Thank you for your patience.

Kind regards, Kathi