Did I get screwed??

92 GT needed refreshing. Tore it down and determined I could just re-ring, bearing, and put it back together. Called a local machine shop that is supposedly "The Ford" place and asked him how much to refresh the stock heads and open them up a bit. He says "We can get them to flow alright for about $300. I says "what all is that?" He says "Five angle valve job, guides, seals, resurfacing, and "opening them up a bit". I had to provide the valves and springs. Two weeks ago I took him my heads, as well as my block, oil pan, valve covers, pistons and rods for hot-tanking and cleaning. When I got there yester day to pick them up, the bill was $720 total!!!!! I paid by check and loaded my stuff...shell shocked.
Checked the stuff out closely today and I am disgusted. Had the heads inspected...ONE angle on the valves, two on the seat. Ring lands on the pistons still have crud in them. The only place the heads were ported was in the exhaust side, where they knocked off the EGR humps. He didn't even know what kind of springs were on it when I asked him....

Now you guys look at the receipt, and tell me what I should do. A $300 job ended up being $720, plus I don't believe he did what was agreed upon. So now, I have a basically stock set of heads that cost me over $550. Any suggestions????

What I am so disgusted about is the fact that he quoted me $300 to rebuild my heads. I went that route because I am on an extremely limited budget. With all the cleaning on my other parts I expected the bill to be at the very most $450. If I had known it would be that high, I would have bought some 40's, or I could have even got some Thumpers for that price. Plus, the "cleaning" was piss poor. Like said earlier, the pistons were terrible. Crud all in the ring lands. Hell, the oil pan still had crud in the bottom of it.....and a $100 cleaning charge, when now I am still going to have to clean everything again!!! Not to mention the fact I will be riding around with a $550 set of STOCK HEADS!!!!!