Taken complete advantage of not only me but my mother!

My mother saw the ad and we decided to go together.  We were convinced this was a good deal as we live in very poor conditions and nobody ever helps us, we thought, Yes!  we been approved they are going to help us! we were so excited! They told us that we could split the cost and soon would be able to refurnish our whole house! .......little did we know we were being dragged into a scheme!

Now I feel like a complete idiot and taken advantage of. I am out of $758 and that is a lot of money to me. They keep calling from National Finance group still wanting thousands more.  I told them I lost my job and my mom is sick and unable to work. I also informed them that I was no longer interested and they told me but you owe! OWE WHAT??? I didnt receive anything! Please help.