I purchased a stearns and foster mattress in aug. 07. the first mattress delivered was torn, the 2nd mattress delivered was torn, the 3rd mattress delivered had a little tear in the binding. I was so fed up that I said I would keep this mattress. I purchased insurance for it. I then was told I had to sign and "as is" letter. I did. the letter states clearly that the insurance would apply to the undamaged portion of the mattress. Now the mattress is sagging on both sides 2 inches. I tried to get Macy's to send a service man out to verify this but they refuse. they refuse to do anything for us because of the "as is" letter. Can you help?