This is how I find the hard to find accounts. Through Google advanced search. The products bought work 95% of the time even if you don't know who it is you're buying from. If not the vendor usually responds to a message, for small $$ it works for me but at least slut.io has feedback. I searched Google and didn't see any scam reports against the screen name so I thought I would take a chance.
Like I said, it looks like the Payivy you made before the quickzen account.
Not hard to believe you would have one for Quickzen and one for your actual screen name which is rikugou.
If this was rikugou1337 then yeah I would say I was screwed but it's your exact screen name, same header, same products and the code I got was valid but used.... considering I am a buyer and you are running the business I am more at a loss than you would be if you gave me a working code.
If you are not a scammer you at least have some part in it because otherwise I wouldn't have been able to find your business or post a scam report... that dude is trashing your business and his autobuy needs to go down.