The Coffin Is Coming/Walmart to The Rescue

My backup 360 is going to be returned for the 2nd time.  No red lights.  My son yelled at me that the 360 wouldn't work.  I go downstairs and it says disc unreadable.  I try another disc.  Same thing.  Try another and another.  I then do a little research and it tells me to turn it off, take the memory off and try it with out it.  No help.  I call Microsoft.  Of course we will be glad to take care of it for you..... for $99.  I just had it fixed in April.  I thought I got another year warranty with it then.  Nope.  They said because I didn't have to pay for that repair, I get no extended warranty.  I politely tell them no thank you.  I then go dig out the warranty I bought from Walmart.  According to it, I am covered.  I call them up and they treated me like a customer is suppose to be treated.  Somebody told me that they just end up sending you a new one.  Anybody have any experience getting one fixed through Walmart?