B.S.  Arbitragecoins.com has mega issues and problems.  Customer Service chat (the only method of contact)  takes hours to get a response and if you don't respond right away, they dump you and you have to wait some more hours to start the conversation over.  If you're not a complete scam, you don't have near enough customer support.  Remember that people are more likely to resolve the issue on your site first.  It's only after tiring efforts to get things resolved that most people will bitch on the forums.  No proof needed, it's human nature.  Good Customer Service doesn't demand proof.  So your option here is to support your customers and quit scamming them -that's the only solution.