Charged by «Muse AI»?

The line on your card statement says who charged you.
Find it, then use the row that matches.

APPLE.COM/BILL

An App Store purchase. It can be Muse or any other app. Apple lists every purchase and handles refunds at reportaproblem.apple.com.

GOOGLE *

A Google Play purchase. Your Play order history shows which app it was, and Google explains how to ask for a refund: Google Play refunds.

Anything else

Not Muse. Muse is sold only through the App Store and Google Play. A line such as «MUSE AI» with a phone number is another company: contact that company or your bank.

Still not sure?

Email hello@giantsquare.app with the statement line, the date and the amount.
Never send your card number.