Refunding reward points?

Refunds of points may be considered on a case-by-case basis. Once you order a Reward, you cannot cancel it or return it for a refund of points. If you have questions about an order, contact
Microsoft Rewards Support.

For help with the Microsoft Rewards program, you'll need to contact their customer support.

I do not think they refund microsoft rewards points for accidental sweepstake entries. I am sorry but good luck on the sweepstake

Hey there brandiesel1,

Thank you for reaching out to us with this question. You can always request the refund going through the Refund Request form. Of course if the refund is approved then those points should be deducted from your account as it could be considered a form of fraud
if you receive the refund and redeem those points for other rewards.

Once the refund has been approved just give it sometime for those rewards points to be removed. If you would like to ask for more information you can always submit a support ticket directly to the Rewards Team so that they can provide more information regarding
this.

Microsoft Rewards New Support Request

I hope this helps.

You might get lucky to get a points refund but I wouldn't count on it:

"Refunds of points may be considered on a case-by-case basis. Once you order a Reward, you cannot cancel it or return it for a refund of points"

The question would be why you chose to redeem your points for something you have no interest in?