Contact for refund

Hi, I uninstalled Avast recently but Avast charged my credit card anyway. I am trying to contact them by chat but all I get is a progress circle which has been going for more than 30 minutes. Does anyone know how to conctact Avast?

https://support.avast.com/en-ww/article/Unsubscribe-FAQ
https://support.avast.com/en-ww/article/Refund-request