Based on my experience, your H1B is no longer valid. And if so, you will have to reapply. This is specially true since now you work for a "different" company. And yes, you will be subject to quota...good luck
I did provide engineering services for a construction company. Their client (which I call the "owner") severed relationship with them, I was never paid on the plans I provided. The construction company never did any contruction work for their client. How can I recoup the fee without getting into...