Please help me, I am devastated

I have been working for a boutique consulting firm for 8 months now. I was assigned to a client and the job is going very well. So much so that the client asked me to join their firm - twice.

Twice the client asked me to be a full time employee, which I applied for. Twice my current employer declined to let me out of my contract. If I get this job, I can take care of my family and also be fulfilled professionally. I don't know what to do.

I live in PA.

Please, is there anything I can do? It's my dream job and I'm devastated that someone who gives no fucks can control my destiny like this.

EDIT: I asked again for a copy of the contract - dead silence from HR. Going to give them until Monday morning and then just go in there and wait until I get it.