If a item have a price above it and there's nothing else around shouldn't I be able to get it for that price?

Yes, speak to a store manager

Use Amazon App that has a barcode scanner and I bet you can find that same product somewhere else for cheasper.. problem is, can you wait an additional day or not in getting the items!

No price matching at rhe store but the Walmart app will check store prices and there may be a rebate of the difference. Keep and scan the receipt and response in 3 days.