I get no response after requesting a refund either, and it's been a week since I logged the ticket. There's zero documentation that's accurate in regard to processing through Digital River, nor is there any clear means of requesting through the Avast Support Portal.
They also never emailed me my license key, I had to request multiple times for this to come through. And btw - If I've got to check SPAM, then you're failing at using proper DKIM and SPF settings on your mail relay or server.
They've left me no other choice other than to raise the issue with PayPal, so they'll now be sorting this out if Avast continues to ignore my request.
Next call is going to be to the Better Business Bureau.
Ticket #3660