I can see that you have signed up for several trials before so I believe you might be aware that this charge was for the continuation of your subscription.
You don’t seem to have created a ticket for a refund. If you do not wish to use the application then please request a refund here: https://support.avast.com/en-eu/contact/sales
Please use this order id: 83127921700
I am aware of that but I don’t want to continue my subscription. I’m fairly certain I cancelled my subscription the 28th of september but nothing happened so it seems.