For £2.68 I fear you have been sold a dud/fake/hacked license that has subsequently cancelled/downgraded. I can't see how it can be sold at £2.68 when it would normally cost much more directly from Avast, see image1. Whilst it is possible to get it cheaper from an Authorised Avast Reseller, but not by that much
Often when a price is too good to be true, it often is.
Site not found when I checked, see attached image2 and link when trying to check the site
https://sitecheck.sucuri.net/results/gamivoo.comUnable to scan your site. Host not found.