Peachy App Charged Me After I Canceled the Free Trial

I accepted the 1-week free trial on the Peachy app and canceled it before the trial period ended. At that time, my card was already disabled, so no charge should have been possible.

However, after I received a new card and entered the updated card details, the app charged me anyway. I don’t understand how this happened. I am requesting a full refund of the fee that was charged.