I really hate that there is really not much of protection for the home owners in the pool building business.
Without commenting on your situation in particular....unfortunately, this is the reality of most of our situations. I don't think we can overestimate the importance of doing Due Diligence on Pool Builders and their various subcontractors prior to signing on the dotted line. It's all too easy to get enamored with a given PB's design or get too hung up on pricing. Elsewhere on this site there is some guidance on How to Pick a Pool Builder, but in my opinion, it's not specific enough to help people avoid your situation. With the collective knowledge on this forum, I think it should be possible to devote a section to "best practices" and "worst practices" and even get some cycle time data on how long it takes various PBs to finish construction. Just my $0.02...