You paid him to create a coin. Coin needed a stable network for launch, He made that happen too. Did he deliver your coin? Yes? No scam here.
In his own words:
you said you wanted no premine, you never said i couldn't premine it
He admits he was told no premine AND intentionally 'misinterprets' it and performs his own premine.
He openly admits he accepted this job for .4BTC, then claims it wasn't worth it so he premined. Why not negotiate a better fee?
I'm sorry, but this guy comes across as a liar, a thief as well as a scammer.