DavidR
2
I don’t know why you haven’t received a response from the support tickets, but submitting multiple tickets may have slowed things.
You can try the on-line contact form, http://www.avast.com/contact-form.php?loadStyles: to Sales, give as much information as possible, Receipt/Invoice reference number, date of purchase, email address used when you purchased the license.
You could also give the support ticket reference.
Not sure what ‘technical’ support you contacted, but if it is the free call number that is a 3rd party support (not avast) dealing with program problems and aren’t going to be able to deal with sales/refund issues.