[mothered]

Anything else I could do to improve my chances?

The serial number method Is not a straightforward process by any means.

Requests such as a POP, the Item be returned, a POD, an Image demonstrating the damage and also troubleshooting the Issue are Inevitable. It's a step-by-step procedure that's based on any or most of the above events. The best you can do on your end, Is to tackle each one effectively as It comes to hand.

Also. I found a Walmart receipt template, would it be better to use it instead of serial number

Unfortunately, you cannot specify what to provide - the representative will ask what's needed to assess the claim.