Can I downgrade MCC into Reach only?

So I wanna know, if there’s any way of converting my MCC into a Reach only and get a refund for the content I haven’t used yet.
The service for Reach so far has been total thrash and I’m not looking forward future releases.

In steam you can refund a game if you didn’t played 2h.

https://support.microsoft.com/en-my/help/10558/microsoft-store-returning-items-bought-for-exchange-refund
You can’t play Reach(Campaign/Firefight) without MCC on console.

> 2533274871396905;3:
> Returning items you bought from Microsoft Store for exchange or refund
> You can’t play Reach(Campaign/Firefight) without MCC on console.

Ah crap think I posted on the wrong forum

> 2533274832510269;2:
> In steam you can refund a game if you didn’t played 2h.

I’ve played more than 2 hours already.
Was looking for a downgrade since I didn’t touch any of the other content yet.