cancel auto-renewal

Hello, i tried through my profile cancel auto-renewal for Avast Cleanup but it showed me a mistake to call you. There are still 8 days of trial period, and I do not want to use the program because I did not like it. Please stop the auto-renewal option, thank you.

https://www.avast.com/faq.php?article=AVKB24#artTitle (Orders and Renewals)