01-16-2020 12:25 PM
Welcome to the Best Buy Community forums. Thanks for joining us.
As noted here, orders can only be cancelled within 30 minutes of being placed. It's likely that your order is already in progress and that's why you don't have the option.
I see that you sent in a private message on this. I'll shortly be replying to that to go over the details of what I was able to find based on that.