Hello Eddy, your quote, following:
The link you provided has no phone numbers listed. The only things offered are support tickets. Try clicking on the link you provided and see where it takes you.
I had similar problem, but mine was a refund. The only way I could actually make telephone contact was by walking down the street a few blocks to the bank that held my card, and presented them with the double billings. They in turn called Avast ( the bank must have the secret number? ), they then let me talk with someone from Avast and the refund was quickly resolved.
In my case, the guy I was talking to from Avast, gave me a phone number that I can call if I have anymore billing problems. You or anyone else can find this number, in this forum, under my complaint listed as "Billings." I don't know if the number works because I now have no reason to call it.
Thanks for your time.
Dan