How can I change the delivery address of DSL router?

I placed the order for the "O2 DSL M Flex" earlier this month.  The installation address of the DSL was correct but unfortunately the delievery address was incorrect. I have confirmed from DHL tracking that the delivery of router was failed and the router is sent back to the company.

Now I would like to change the delivery address of the router and would like to get it delieved to my new address.

Following are my details:

Telephone Number I got with DSL: 06984778078

Order number for router: DRZ28142572

Correct Delivery Address:

"Kalbacher Hauptstraße 47 A
60437 Frankfurt am Main"

Original Incorrect Delivery Address:

"Herr Raheel Arif
Klappacher Str. 47a
64285 Darmstadt"

(The Postanschrift and Rechnungsadresse are also wrong)

I don't know how i managed to type the wrong address three times :-/

Looking forward to your positve response.

Best Regards
Raheel