The router provision price of EUR 49.99 only includes the provision of the router by o2. No further services are included, in particular no installation by a technician. 

The provision price will not be refunded if the customer wishes to return the router. A return to Düsseldorf is not possible because the router logistics are not located there.

Since you write about a Fritzbox 7490, I assume that you have been using the device successfully for a long time. Is that correct? 
If the device has been working normally and now no longer works, it is advisable to contact o2 customer service and report a fault. If o2 customer service also suspects a defect in the router, they can arrange for the device to be replaced free of charge. 

Hello @Nikolay Ulyanov, welcome to our o2 community :-)

I am sorry to hear there seem to be issues with your Fritzbox. If you at first set up a Fritzbox it may happen that it seems a bit unresponsive. This mostly happens while the box is synchronizing with the DSL signal. 

The ecessary credentials to login to the Fritzbox you will find either on a sticker on the bottom of the router or in a seperate information located inside the package.

If there are still issues I recommend to follow @blablup’s tipp and get in touch with our customer service so they can have a look into this.

Regards,

Lars