I got 86.00 USD on my creditcard statement although i do not have an account with avast. I just created this account today write this article,
Gow can i get my money back? Any idea?
Thanks for help

We have heard this many times before, but it usually boils down to that user have done a mistake

How can I request a refund? >> https://www.avast.com/faq.php?article=AVKB24#idt_0430

DRI and Avast need to be reported to your bank. It is a scam – they are taking money unlawfully. My bank is investigating them for taking £120 in a 12 month period. Good luck.

They are not scamming at all.
It would not surprise me if you screwedup yourself as almost all user who complain did.