Paid for a years subscription and when I had a new computer could not get it transferred wrote a few e-mails but was ignored,as for contact us your having a laugh.
Take a look here: https://support.avast.com/en-ww/article/Transfer-Antivirus-subscription (Transferring an Avast Antivirus subscription to another PC)
A useful tip…
When you’re requesting a support assistance via email, do not open more than one support request. If you do, It will put you on the end of list.
Usually, the English support may take between 3 to 5 days (business days) to answer it.