Hi and thanks for reaching out. I hope you’re doing well. I'm an Independent Advisor and a Microsoft user like you and I'll be happy to help you.
As per checking, Destiny 2: Lightfall is not an Xbox Play Anywhere, meaning, it cannot be played on both PC and Xbox console. In this case, what I can recommend is to cancel your pre-order transaction by following the steps below;
- Log in to
https://account.microsoft.com/billing/orders then search for the item you would like to cancel. Click Manage, then cancel.
- If you are already charged for it, you can request a refund here:
https://support.xbox.com/en-US/forms/request-a-...
Hope this helps.