Do you think I got screwed, or is it just part of the hobby?

well ive been down this road myself paid a shop(well known) to build my 340 years ago and picked it up nobody could tell me what gas to run so had to wait got that fig. out, installed it with everything that i told the shop i had and paid them almost4000.00 took car to the track damn thing wouldnt get out its own way..look through my paper work no warr. on something thats hi performance damn im stuck..took it apart and to another shop to check machine work..bores are not true,head cc was way off, was chagered over 300.00 for a comp cam and lifters,was told i needed eagle h beams rods for 500hp thats 550.00.anyway got all the parts back from the 2nd shop build it myself and my son,with a little tune it ran ok 7.44 in the 1/8 mile..so if they do get it fixed your lucky...