[kosso]

Check any contracts and paperwork you might have signed. Read them thoroughly and then read them again. Get someone else to read them if you can.

What you are 'told' is rarely what actually happens at a startup, unless you have fully understood, signed contracts.

What is it you want do? Create the same or competing product? Get some compensation / shares / revenge? Or simply move on?

If you only worked on this thing for two months, then it's no great loss is it?