How can I resolve this issue with my Xbox one?

Hi there! This is Ronnie, an independent advisor.

Nice to meet you and I hope you are having a great day!

I understand you need help with your Xbox problem.

Have you tried testing out new power supply?

When an indicator light from the power supply turns red, that normally tells us there is an issue with the power supply.

You can also check this guide here:

https://support.xbox.com/en-US/help/hardware-ne...

I would suggest testing out another power supply just to really isolate the problem where it is coming from. If it is from the console or just the power supply but in your case, I can tell this is a power supply problem.

The game was purchased in the XBox Store from XBox online. This bundle included the game and many different downloadable car packs. In game, they appeared in my message center. When I try to accept the cars, it says my settings won't allow them to be downloaded.

I found a video last night detailing how to reset the XBox to factory settings, but I haven't tried it yet, but I'm hopeful that this will work.

I feel like I wasted money on this purchase, as I'm being denied what I paid for.

My name is Fernando I'm an independent consultant, I'm happy to help

Try logging out of your account and logging back in to see if that fixes it. You can also try redeeming through other devices such as the Xbox mobile or desktop app. Try restarting the console as well.

I hope I helped and see you soon.

when you say it came with "a bunch of gift cards" where did you get this offer from? What specifically did it include?

Yes surely. The article below has information to help you about the Xbox mobile app.

https://support.xbox.com/help/games-apps/game-setup-and-play/all-about-the-xbox-mobile-app

Sincerely, Fernando