Kmart Sears Sold fake diamond ring for a real one Eau Claire, Wisconsin

on march 31 2013 my husband purchased what he was told was a 1/2 karat diamond ring set in a white gold channel band and was told that they didn't size rings there so the ring was taken to a jeweler only to find out that the ring was fake. the so called diamonds where glued in and the jeweler was not able to tell me what kind of metal they where set in. when I informed the store of it they told they where sorry and that they would make it right only to find out that it was a lie also. first they offered to give me a ring at no cast but not the ring I purchased. so in the end they decided not to give me a ring they would give me a 100.00 give card that I hope they really send to me. this is very disheartening because me and my husband where getting remarried in march of next year. that is still going to happen but without the ring . and the corporate office that was a joke to didn't return calls and really didn't do anything very upset