Have your agent find you a home that is really for sale.
Or wait until this home is listed by your or another REALTOR.
The most reliable road to success if made by those who really know what they are doing.
The seller does not know what they are doing. They fell into an investor trap. Exercise care and verify everything.
Your agent is the resource to whom you should turn. Your agent can review the existing contract, for a fee, and determine what can be done next. You are not at a dead end.