I had activated the adobe trial version but my account has been charged since six months and I don't know about it, please refund me the amount charged to my account.
these are user-to-user forums so no one here can help you cancel.
if that fails to help you can your own subscription, using a browser that allows popups and cookies, contact adobe support by clicking here, https://helpx.adobe.com/contact.html?rghtup=autoOpen
in the chat field (lower right), type AGENT
be patient, it can take quite a while to reach a human
p.s. if you're contacted by anyone (via email or private message), it's much more likely to be a scammer than an adobe representative. ie, double check for an employee badge if contacted in the forums and look for an adobe.com domain in the email address if you click reply to an email. then check again and be very suspicious. any other method of contacting (or offering to contact you) is almost certainly a scam, https://community.adobe.com/t5/using-the-community-discussions/staying-safe-in-the-adobe-support-com....
p.p.s you can also use phone (but chat is usually quicker), https://helpx.adobe.com/contact/phone.html
p.p.p.s. you can also use twitter to tweet @AdobeCare.
again, these are user-to-user forums. telling your story here isn't going to help you.
again, if you can't resolve this yourself, contact adobe support.