eBay

I have a buyer thats has not paid after 3 invoices but when I hit cancel order its either address issue,damaged or destroyed or buyer asked to cancel...There used to be one with buyer hasn't paid....What do I do now? i tried chatting that was useless...

OK, So I shipped a package and the buyer said they charged him 16.00 more due to it was in flat rate box I get that .So I did refund his 16. because he sent me proof. Then I get notice from ebay that they charged my account another 9.70 for under pay...

After several invoices and message's I have had several people that just wont pay. Is there no consequence's for these people? I think it should be in there feedback column. Its so not fair for us sellers. So frustrating..