Castro Pool Service - Unlicensed Contractor

I would never recommend this pool company or the individual who came out to my property. From the very start, he tried to upsell me on an estimate from another company?asking me to pay him the difference directly while claiming he could do the job himself. The work in question was mostly masonry repair for a pool crack, but it became clear very quickly that he was neither knowledgeable nor reliable. He constantly showed up late (when he showed up at all), invaded my privacy by looking up my personal profile on Facebook, and then lied about it by saying that I had looked him up. Completely unprofessional behavior. On top of that, he tried to charge $2,500 upfront before any work was completed, and then demanded another $2,500 after the supposed ?completion??even though he left the pool completely empty, which every real contractor knows can cause serious structural damage and new cracks. That alone could have cost me thousands.