On a refinancing, there are refinance loans where no money is given to the borrower. There is also cash out refinances where you refinance and also take out money against the equity in your home.
Based on the limited information you provided, I would guess that you had a straight refinance with no cash back to you.
You need to consult with an attorney and bring the paperwork on the loan with you. A review of the paperwork would explain what happened.
