help with premium licence issue

Hello, sorry if the subject has already been treated, i don’t speak much english.
i reformated my Windows after using a paying version of Avast (Premium or Premier - 69E) since 2015 and i’m trying to recover my licence.
My skills are very limited with computers, gentlemen please help
would be very kind , i tryed many things but i’m a noob

https://www.avast.com/resend-license-paid.php (Resend paid license)