You've got to be kidding me, r3wt is plainly stealing because he was mad he sold his services for 0.4 BTC. he literally has no excuse for expecting any sort of sympathy. That's like a thief asking for forgiveness after being caught riding a stolen bicycle because he wants to become a race-car driver.
Seriously, just give back the stupid 0.4 BTC. I mean really man, that's like $40 dollars in the current market. You're going full retard by saying that they shouldn't of expected you to make a shitty product because you offered a low price.