Cleaner Guru Charged $8 After I Canceled the Free Trial

I started the 3-day free trial of an app called “Cleaner Guru” through the Apple App Store, which is designed to clean up photos and images. After trying the app and deciding that I did not like it, I personally canceled the subscription through the Subscriptions / Payments section of the Apple App Store before the trial period expired. Despite this, I was charged $8 on my credit card on April 8.

I do not accept being charged even though I canceled the subscription during the free trial period. I request clear confirmation that the subscription I canceled has been fully terminated and that the $8 charged to my card is refunded to me.