I prefer no automatic subscription

In September 2016, I payed for AVG Internet Security for 2 years, this September I got a remainder and I payed for next two years (till 2020). A week later I got e-mail "You don't need to do anything, you will be charged". The web page how to cancel automatic subscription is not helpful at all. I will be grateful for a hint.

Hello, Krzysztof.
We'll certainly assist you. We'd like to confirm that we have received the payment for AVG Internet Security - Unlimited (2 years subscription) and the product is active until 16th Nov 2020. The email you received could be a system generated automatic email notification about the older subscription. We assure you will not be charged for another renewal.

If you need anything else, do not hesitate to let us know.