How do l cancel my subscription that just renewed?

General
1

How do

2

First, I’m an Avast user and not an Avast Team member.
You could check this out

Sales - Orders and Renewals FAQ - https://support.avast.com/article/Alternative-unsubscribe/
Also see - Purchasing and Billing FAQ - https://support.avast.com/article/sale-billing-faq/#pc
You should also be able to do this from your Avast account either from the Program settings or by logging in to id.avast.com