Someone stole your purchase, police should never call that a civil matter. Cops aren’t going to help anyway, but without the police report neither is BB, DD and ultimately your bank because the lack of getting police involved makes it look like you are committing fraud. Get the police report and get it to your bank before the back concludes their investigation because it’s harder to reopen one once it’s closed.

Walmart has Spark which is a delivery network they control that’s similar to door dash but AFAIK doesn’t require any logos on the vehicles.

When I worked for a bank call center the first question before initiating the dispute/chargeback process is “did you attempt to resolve this with the merchant first?” It is a requirement for doing the dispute. OP needs to clearly say yes, and they prevent it by not letting me speak to a human.

OP should also file a police report immediately. They won’t care, but at least the store can’t accuse OP of not following properof procedures.