It is not possible to cancel a refund in progress
Information on refunding a BlizzConline Celebration Collection
All in-game purchases in Call of Duty are final, and not eligible for refunds.
Checking on the status of a delayed refund.
Money refund policy for purchases of Call of Duty Points.
Friend or family member used payment information without permission and I would like a refund for the purchase(s) made
Customer Support may ask you for your PayPal billing agreement ID or your order invoice ID when assisting you with a refund
How to resolve this error when redeeming a Blizzard Balance code
What to do if you purchased a gift and you sent it to the wrong friend by mistake
How to resolve the error message "We can’t process this code at this time"