Subscription fee charged for cancelled subscription within free trial period

I subscribed for muscle monster app free subscription for a week after which the subscription amount was supposed to get deducted on 22 November 2024.

Kindly note that I canceled the subscription on 19 November 2024 itself and still the amount which was supposed to get deducted on 22 November 2024 got deducted today on 21 November 2024 despite of the fact I already canceled the subscription during free trial period.

Also the app and the amount is not showing under refund section in order to allow me to request for a refund.

kindly refund the amount that got incorrectly deducted at the earliest.

Also I am unable to change my device under device section the currently tagged device is incorrect as there is no option that is coming up for my device iPhone 14 pro