1995 Honda Civic Mechanical Repairs

Started out that I noticed oil leaks on driveway. Took to mechanic. He changed oil and said it was due to leaking valve. Replaced that. Then had to take it back because it was smoking really bad. Said it needed a new timing chain, etc becuse it was at the 180K mark, so he replaced the water heater, etc. And supposedly fixed the oil leak. Tonight started it up after it has been sitting for a few weeks, and there is the smell of oil on the motor again, I have taken it back to him to test the tightness of the head gasket, and he said it was fine, but there is fresh oil slung over the motor, and the oil stick was dry as was the radiator stick. What do I do now? Are there any warranties on work over 60 days old or am I just stuck now? I had no problems before all of the oil was on the driveway in the first place and I thought it was just going to be a leaking gasket like he said, but now 4 trips later and looks like its going to be another one tomorrow what do I ask him to look at or do? Do I have a right to my money back or what?