Shane Co. review: diamond cleaning

I took my wife's wedding ring in for cleaning. The person that helped us drew a picture of any flaws in the diamond. There were two small dots he drew on a picture. Unable to see with the naked eye. When we went to pick it up, my wife immediately said "this is not my diamond". We complained and they told us that they just need to run in through the clean again. It was yellow as well. I think Shane Co replaced our high quality diamond with a cheap, less valuable one, in hopes of us not noticing. NOT COOL. Is this why they offer "life time warranty and cleaning". So we can come back and they replace it only to sell it again? WTF!