unable to apply license

I had avast pro, and bought premier.

However, when i click on apply license, i get a blue bar at the bottom of the avast box that says ‘we are sorry, we are unable to apply your license to this device’

~This is very annoying, I would like to know how to fix this.

In addition, it appears that I have auto-renew enabled on the Pro license, and i cannot find anywhere to disable this renewal.

All help would be greatly appreciated.

Have you tried the FAQ section? https://www.avast.com/faq.php

FAQ videos https://www.avast.com/faq.php?q=video
auto renew https://www.avast.com/faq.php?q=auto%20renew