Weltman, Weinberg & Reis Co,. L.P.A. Lied about the a settlement on a private student loan debt Columbus, Ohio

I had a private student loan and it went into collections.  I paid the collection agency for over 2 years and then they sold it to Weltman, Weinbert & Reis who contacted me.  I was told the remaining balance and was asked to pay in full.  When I informed them that I did not have that type of money they said that they were willing to settle for a different amount.  I again said I didn't have that type of money.  The man on the other end suggested that I borrow it or get a loan for it because my credit was not that bad.(I didn't authorized them to check my credit) Well, I could not get a loan for the amount that they wanted to settle for but they said that they would take what I had and I could make payments on the remainder of the settled amount.  Now they are saying that the settlement had to be paid in full. 

If I would have know that, I would not have taken out a loan.  I would have made arrangements to make monthly payments to them.  Now I have 2 payments to make amount instead of 1.