Premium Membership

Before a month they have sent a message that there is a free donation of diamond subscription.I didn't had used.Before 4 days I tried to use it. I completed my card details but there is any free ofer by game.Then I charged by astronomic amount of 70 euros!I promise to make campain in greek comunity against this policy of game.This policy is illegal!!

Yes, it's terrible, and I'm getting no replies from staff...
If you want a reply from the staff, you send them an email. (The link is in Help and Support on the bottom of every page.)
Posting on the boards is a hit and miss proposition. They don't monitor every thread all the time. (There are hundreds of new threads every day.)
You were probably right Notmtwain, I got a reply to the mail I sent. It would be more logical if the staff would be monitoring the help & support section though...
Everyting is alright now so to Giorgoschale: send an email!

Ι have sent 5 mails .....I have no answere... The first mail I sent before 4 days .When the time pass I charge with something which I have no ordered.
I sent an email via this link:
https://support.chess.com/customer/portal/emails/new
In it I wrote almost exactly the same as what i say in my original post. After almost a day I got a reply.
hello staff,
I want to cancel my premium membership and get my money back.
I was offerd a free ten day trial, then apparently I had to cancel it myself after that period (!!! shame on you chess.com.) I did this yesterday, still i see that i'm a premium member and it says that my memberschip will end next year???
I want it to be cancelled immediately, how do I do this? (the link to the cancellation page does NOT work, it redirects me to my homepage where a red block appears saying that my membership is active untill 15-10-15 - also, if I click on 'Home'>'account', there is no option to cancel (as was stated in several forumposts I read))