No attorney can appropriately advise you on what to do in a complex real estate transaction based upon one paragraph of information. There are too many issues, too many options, and too many unknowns. I strong suggest that you directly contact an attorney in your area to help you address your situation.
As an aside, I'd add that you and others like you experience difficulties like this because no one is really looking out for you and your interests in the process. Not the sellers, not the lender, not the real estate agents. Only an attorney is focused on advancing and protecting your interests in a real estate transaction. As the saying goes, an ounce of prevention is worth a pound of cure.
Good luck to you.
The foregoing is intended to merely provide additional information to the individual posting the question and to anyone reading the question and/or answers provided. There is no specific legal advice provided. Specific advice cannot be given without first forming an attorney/client relationship. This informational answer is not legal advice, and should not be relied on, since it is impossible to appropriately evaluate a legal problem without a comprehensive consultation and review of all the facts and documents at issue.