Sky Q box return

[ACH9]

I have received a new Sky Q box and at the same time DPD collected my old box.
Unbelievably  3 days later DPD have returned my old box back to me instead of sending to Sky. 
How do I get this back to Sky - DPD wouldn't accept it as I didn't have a return label!! 

[caesarome]

@ACH9 

This link will help you to return the equipment via Royal Mail.

https://www.sky.com/help/articles/return-tv-broadband

Add a note inside with your account number and a list of equipment you have included.
Make sure you get and keep proof of posting when sending this off.