Can i get replacement equipment via mail ?

Hi i have had cox contour dvr and 2x contour 2 (small box's) for less than a month and one of the small contour 2 box's has quit working.

Is there anyway that i could get a replacement contour2 in the mail and then mail back the faulty one ?

Or do i have to go to a physical store to get a replacement ?

P.S. i have done all the troubleshooting possible ..new hdmi cable,resetting cable via online and even moving to another room and tv.

Thanks