EBAY MEMBER THREATENED ME AND EBAY DID NOTHING!

I was selling several boxes of coins and one individul won two auctions on a Sunday night. Through the whole week I sent him six invoices where he never responded nor paid. The following Saturday night he purchases another box and wins the auction again. He then requests the total amount for all three. I sent him an invoice for all three items which was was $165.00 plus 26.85. One flat rate priority box per item, for 8.95 each, which is the actual cost per box.I was not making any extra money on shipping and the flat rate priority box saves the buyers money as well. He was saving money because these items each weighed 21 pounds. He requested the total two more times and I sent him another invoice with a $5.00 discount, and he requested another total. Fed up,I then sent him the full amount and told him this was the final invoice. He then replied with a threateing email stating he was not going to pay for the items, and I could go to hell, and if I gave him a negative feedback he will do the same. I immediatly sent Ebay the letter. Over the next two weeks as I placed a dispute to get my refund I sent Ebay the same letter six times pleading for help, and I also spoke to the live help Department several times and they kept requesting me to contact the Trust And Safety Department for a seventh, eighth and ninth time. I was finally able to close the dispute, left the buyer a negative feedback, and he did the same carrying out his threat! THANKS FOR THE HELP EBAY! Ebay does not have any Customer Service! They send you Generic Emails not pertaining to your problem, and do not help you. There are lawyers that will help you with Ebay and a class action suit is in the works for Ebay double charging people to List an auction, then charge you a final value fee. Thats double charging! Im finished with Ebay, and so Is My Company!