Two months ago I was offered a 2-Month Free Trial by Avast, which required a paypal account to be activated. I got it and now, at the end of the free trial, I was automatically changed into and charged for the One-Year Internet Security subscription. I did not want this or can afford it, what can I do to have the subscription and billing cancelled? I already contested the payment on Paypal and sent the company a ticked but got no reply so far.