AirPod pro 2 serial number discrepancy

Serial number on AirPod pro 2nd generation case is not the serial number that shows up when connected (in settings).

these AirPods were purchased at an apple authorized retailer (Walmart- in store). Apple store wouldn’t help me because they said the serial numbers don’t match. Walmart won’t help me because I bought them 2 months ago and return period is only 30 days. What do I do