Contact an employment lawyer and bring along all the texts to determine whether you had an offer and a contract.
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You likely didn't have an enforcible offer because the emails made it subject to a contract. Consult an employment lawyer.
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It has to be determined if the e-mails, taken together, contain a written unconditional offer and acceptance of employment that contain all the terms required of an employment contract in NY. "Unconditional" means the agreement was not subject to any further action, negotiation on material points, or any vetting of your background and qualifications. You should seek counsel from an employment attorney regarding this. An employment lawyer such as myself can review your case and, if warranted, send the company and the recruiter a lawyer's letter that would get their attention and perhaps get the company to re-think hiring you.
Unlikely you have any recourse at all as your question admits their was open points of negotiation to be resolved but in fact were not....so the fact that there was no meeting of the minds on one or more material matters will defeat any conclusion to the contrary., especially if had to do with noncompete and/or non solicitation issues post-termination of the contract in question.
My advice to you is to put your negative emotions aside for the moment and write a very polished and professional letter to the employer that withdrew the offer and inform them that although they are free to change their minds midstream that the way they did so was unprofessional and that you hope that this was just one instance and not their usual may of conducting business. The point will have been made and --who knows-- they may call you back realizing you are the kind of person who is professional to the end and better than they are. Burning bridges may nit be the best use of your time and money seeking retribution in the courts that will reflect negatively when you sit down for the next employer and they find out you are very litigious....could hurt you in ways you do not see at present.
My answer is not intended to be giving legal advice and this topic can be a complex area where the advice of a licensed attorney in your State should be obtained.