Bought a game from the Xbox Marketplace, but it says I don't own it

Hi,

So Xbox was having this sale for backward-compatible 360 games for like up to 80% off. I bought a few and all were charged to my bank account, and I got the email receipts for them all. I was able to download all of the games except for one, but I was still
charged for it. I thought maybe I had to manually download it from its own marketplace page, but when I went back it was asking for me to buy it again even though I already had. I'm not really sure what to do in this instance; I've tried troubleshooting, but
couldn't find any solutions, and I tried talking to someone but they couldn't find any answers either.

If anyone has any ideas, I'm all ears,

Thanks

:)