Does the failure to disclose law apply in the case of furniture contracts

Went inside Kanes furniture to "purchase/finance" bedroom set. Was given a document to sign. Agent covered top of clip board where name of document was, and directed my eyesight to signature line, just to learn six months later I had signed a "rental" contract for Rent A Center, which was stationed inside a furniture store. I am beyond upset. The agent TRICKED me into signing something I did not want. I have made numerous requests and attempts to have this document converted to a finance contract originally requested (to no avail).