Steak 'n Shake review: Milkshakes

I went to the Steak n Shake in Clarksville, Tn. the other day and got 3 milk shakes to go. I went to the drive through because I was going to take them home. The milk shake tasted like it had grains in them. We got home with them and had to throw them away. We could not drink them. I went in today and told them what had happened and they were unconcerned about it. I thought it was very rood that they didn't even apologize for it. I go there about once a week to get milkshakes and have never gotten one as bad as that was. I thought they had the best milkshakes in the world but was really disappointed that they didn't apologize or give me another one 3 milkshakes. I had to pay full price.