I used my Microsoft account balance to buy 800 robux through Xbox and I just never received it?

I purchased 800 Robux for Xbox using Microsoft account balance that I obtained through Microsoft Rewards.

The Microsoft order history shows the purchase as completed, but the 800 Robux were never delivered to my Roblox account.

I already attempted the automated refund request, but it was immediately denied due to “refund policies.”

I also contacted Roblox Support, but their automated support redirected me back to Microsoft/Xbox Support and then ended the conversation when I explained that I had already contacted Microsoft.

This is a completed purchase for a digital product that I never received. I need someone to investigate the transaction/entitlement and either make sure the 800 Robux are delivered to the correct Roblox account or determine what resolution is available.