Returning items bought from Microsoft Store for exchange or refund

 If you purchased a product from Microsoft or Microsoft Store, you can request a return. You'll then find out if your product is eligible for a return. If you purchased a product from another organization and have changed your mind, you may contact that organization to inquire about returns or refunds (subject to their refund policy). You can check your Order history to verify what you've ordered from Microsoft.

Returns and exchanges

You can manage returns, exchanges, and more on the Order history page. 

To request a return or exchange:

1. Sign in to Order history, and then select Request a return. If you don’t see Request                                                                              a return, your item may not be eligible for a return.
2. Follow the instructions on the screen to get a prepaid shipping label for the return.
3. When we receive your item and find it eligible for a return, we’ll either ship you a                                                                     replacement or issue you a refund.

Refunds

When you make a qualifying return, we'll credit the full amount, less the original shipping and                                                                    handling charges. Refunds are generally processed within 3–5 business days after we receive                                                                      your item and find it eligible for a return. Refunds are applied to the original payment option.

If you face any problem Call  +1-856-514-8666 to Account Microsoft 365 Billing for                                                                              more help and support.