R.Tanaka

too bad u lost ur receipt.

Regarding your accusation to Walmart,
I dont think this is a Walmart's issue because Walmart does not manufacture the disc,
rather it is the retailer/wholesaler....

Regarding your Blu-Ray Disc:
Three possibilities:
1) the disc is flawed (manufacturing flaw)
2) your DVD player has problems
3) you are using a DVD player not having the right CODEC
      for example,
      if u use a Mainland China DVD player to play a DVD made in the U.S
      they are not compatible....(have something to do with the coding inside the disc)