Avast Charged My Card After I Canceled Subscriptions

I canceled all my Avast subscriptions, removed the software from all my devices, and explicitly stated I didn’t want renewal. Yet, they still charged my card. I’m requesting an immediate refund. What’s more frustrating is their customer support is based in the U.S. and is paid, making it nearly impossible to reach anyone. They advertise the number as free, but in small print, it states international charges apply. Avast has been nothing but a disappointment, and I expect them to resolve this and refund my money.