Where Is Seller Support?

on apr 27 i sold a book to dj gels(order  #104-5935234-2176266) asin #9991595988. this buyer changed his mind and wanted to return the item(a book) for a full refund. buyer claimed it had a sticky residue and was a mess. i told him to take another look at it because i had bought it new 30 years ago and kept it perfectly preserved wrapped all that time. i also personally packed and mailed it. he said he just wanted the refund in full. i told him that i charged a 20% restocking fee, and would inspect it for damage which may have been done by him so that i would be covered if i could not resell it as new. i also checked with amazon's telephone rep regarding my proposed handling of the refund. your rep (jason v.) on may 26 told me that since it indeed was returned in a significantly different condition from that in which i sent it, that yes i could charge the restock fee and give an adjusted refund based on the fact that it was now "used,like new'". on may 27 i received 3 identical emails from amazon threatening to take the balance of the refund unless i refund the total amount in 3 business days. the email stated that i did not address the original customer complaint. i listed the reason for the adjusted refund on the refund form. the buyer had previously told me that he did not want any more emails from me. even though my communications with the buyer had been thorough in my position in order to not surprise him unpleasantly. the book was returned with wrinkled pages and a stretched binding which was no longer tight and new. would amazon please check our emails to confirm that i had indeed  addressed the customers complaint, and did my best to communicate fully, including contacting your phone rep for confirmation that i was handling this correctly.  your attention is very much appreciated, Steve.