He finished the design about 3 weeks late
Only three weeks late? Not bad.
no extra cost
So he added $5 of gold leaf to your $20 piece of wood for NO EXTRA COST? You got all that for the low, low price of 1.5 BTC?
I don't care if the graphics are from shutter stock, I paid for a unique wooden coin
Does not compute. I don't care if I received a hamburger, I paid for a steak.
Whatever the case, lessons will be learnt on both sides here.
Almost definitely not.