Returning faulty earbuds by post
New noise excluding earbuds bought on Amazon - the right earbud is not charging. who do I return them for a swap out?
The precise coverage options may depend upon if this was actually purchased from Amazon of if it was a third party seller going through Amazon. You may wish to check the coverage at View Coverage - AppleCare & Warranty
If a third party, see if they offer their own warranty. A device within a one year period should be covered by Apple too, but if it is outside the one year coverage period you may find that only the retailer coverage applies.
Learn more about AirPods service options, warranty, and pricing at this Support web site --> AirPods Replacement, Repair, and Service - Apple Support