Auto Renewal. AVG PC TuneUp

I have received an e-mail giving me notice that my subscription will be automatically renewed 15 days before date December 19, 2017 (purchase: December 19, 2015). A lot of time ago I haven’t been using  the AVG PC TuneUp program and I don’t want to use it anymore. How I solve this affair? I have tried through the site but the answer is that I haven’t any subscription. How is it posible? What can I do to cancel it definitely?
 

Hello Vicente,
As per your request, I have cancelled the automatic renewal for AVG PC TuneUp which will expire on 2017.12.19. The license will not be renewed and no money will be taken from your account for the renewal. Feel free to contact us again if you need any further assistance.
Best regards,
Alok.