Plant Babies Terrariums review for Event Calendar by Elfsight

I uninstalled this app and was charged a week later after I uninstalled the app. How do I get a refund and make sure that I am no longer charged for an app that I uninstalled? The reason I uninstalled this app is because I don't need it right now and I was also unhappy with how long it took to load on my website. Please contact me to confirm that you will issue me a refund.