resolved
Have you followed the instructions offered in the last post of the topic you referenced ???
Hello Bob, thank you for your reply. I’d like to understand first if our analysis with my banker was correct and that this debit actually does come from Avast.
If it does, I’d like to understand why, having never purchased anything there, they suddenly took off my account such an important amount of money?
Reaching out directly to the support is to me not the best way to have those answers.
Thank you again for your help,
H
Only Avast can answer that. I’m an Avast user just like you. 
Thank you Bob,
Do you mean that no one on this forum does work for Avast?
Cheers,
H
No, he doesn’t mean that, the majority of regular contributors, helpers are Avast users like yourself.
There are however Avast Team members responding in the forums. To identify those they have ‘Avast Team’ in the details to the left of all posts, unlike yours, Bobs or mine.