The next thing to do is to check the warranty on the problem device. Hopefully, you printed out the warranty and return policy when you visited the web site of the vendor and made the purchase. If not, see if something came in the box or on the packing slip that was possibly stuck in a plastic envelope on the outside of the box. That little sealed piece of paper that had the shipping address on it that was stuck to the top of the box may actually have been a larger folded up piece of paper that had all sorts of information on it if you took the trouble to open the envelope and unfold the paper. If you didn't get such a paper, or were just so surprised and thankful that it arrived before Christmas that you didn't take the trouble to open it or save it, try to revisit the Web site were you bought the piece of junk.
Many sites post their standard warranty and return policy online.
Well, all may not be lost just yet. Try looking at your browser. If that fails, you might check your browser cache. You can set most browsers to retain or drain the cache at specific levels, but this may be a last ditch effort to find some memory of the site where you bought the problem peripheral. If this also fails, try some search engines.