Oh, M! I am so sorry you've been taken for such a ride!!!!
I hope you can find some way to get a refund on the engine, but it will be difficult to follow up when you're out of state.
You probably need someone with clout to step in and help you before that 90 days expires.
I wish you luck!
About 22 years ago I had to replace the engine on a Toyota Corolla. It cost $800 including labor. I've no idea what these things cost today, but an engine alone for almost 2K sounds a bit steep. Good luck, lady, and I hope someone here at Pips will have some helpful suggestions for you.