Lo Barato Sale Caro

So in January 2006 I decided to put central ac/heat into my house. My house is old and it didn't have a system or the ductwork so I had to put a whole new system in. I asked around and a friend recommended his buddy. I got two other bids from reputable companies but I decided to give this guy a chance because he was Latino and cheaper. I've had nothing but problems with my system and he always had an excuse. Two weeks ago I decided to call a large AC company to come look at my system. Turns out my system is leaking freon b/c he didn't weld the pipes correctly. Cost to put freon in my system $200.00. It's going to cost me an additional $500.00 for them to put dye in the pipes and fix the leaks. Also I noticed last night that the AC fan wasn't turning on. Turns out the fuse in the unit in my attic had blown. The guy was up there putting the dye in today so he went ahead and fixed it. Cost $113.00. Oh and I forgot to mention that he put a 2.5 ton unit in when I needed a 3 ton unit. Of course that's thousands of dollars for a new unit. I totally got screwed by trying to give business to one of my brothers. This isn't the first time this has happened to me. My last car repairman and contractor screwed me over too. What's up with that? From now on any work done on my house is going to be done with the person with the most references I don't care if I'm related to you.