whether you were 'ripped off' or not. What I can say is that the figure you quote isn't at all unusual, and nor are the concurrency errors you mention.
File recovery is as much an art as a science, and results can be very flakey. That's why it just isn't worth bothering unless the files are particularly important/valuable. The worsr thing anyone can say in such circumstances is "I bet you now wish you had backed everything up to removeable media"............so I won't.