Improper charge

Hello Miguel,
Thank you for reaching AVG Community Support Forum.
We regret the inconvenience you had with the unknown charge from AVG. We will certainly help you with the issue. As it is not recommended to discuss your order/subscription details over this public post. Hence, we've sent you an email to your registered email address. Please check for the email and revert to us.
Thank you for your understanding.

I had an improper charge from AVG technologies of €93 and I don't have any subscription, how can I solve this problem?

In this case, who should I contact?