scammed by mechanics, please help

In a boosted car, if the car doesn't have the right knock fighting octane etc, you can blow a piston to pieces. Those pieces have to go down through the rotating assembly .. typically they lodge themselves between the block and say a connecting rod. Presto, engine locked up.

It is possible for the piston to pass, but not likely. So here's pictures of that near impossible thing happening.

Something missing?
http://i20.photobucket.com/albums/b2...5/IMG_4653.jpg

Owwwie
http://i20.photobucket.com/albums/b2...5/IMG_4651.jpg

Here's the piston, in the oil pan
http://i20.photobucket.com/albums/b2...5/IMG_4670.jpg

funniest part was when I lifted the hood to buy the car, it sat all winter ~6 months. I said, "um where's the valve covers?" They were in the trunk...of course..lol
http://i20.photobucket.com/albums/b2...5/IMG_4606.jpg

I've been around boosted cars for the last 10 years, owned about 15 turbo cars, but only one supercharged car (Cobalt). I know about detonation and melting pistons. The first time I melted a hole in a piston it was in a 90 Eclipse GSX, and the car actually still ran, just sounded like a weed eater.

If she said she heard metallic noises and lost power, I would say there is engine problems. But squealing and losing power I don't get.