Purchased from Ebay , not working

Hi, I have purchased Avast premier 5 years product , it worked couple of weeks and now avast switched my license to free one and when I am trying to switch to the license it is giving an error as an unexpected error occurred, when I login to my online account there I dont see the Key which I have purchased which I have been using for the past couple of weeks. How to resolve this?

Avast Support:https://support.avast.com/en-us

ā†’ https://www.avast.com/faq.php?article=AVKB26

Looks like a fake/fraudulent key, the longest legitimate duration for a license was (and still is as far as Iā€™m aware) 3 years.

Sometimes a bargain turns out to be an expensive transaction. :frowning: