This is a question you may want to ask chess.com support for credit card refunds. As it is likely that they dont understand Russian.
Премиум аккаунт

It is 10 day trial, after 10 days they automatically charge your bank acc. To avoid that go to Home>Account>Account Purchases & History and do a cancel premium subscription.
Actually I missed my trial end period, they charged but immediately refunded when I contact support for that issue.

Спасибо за ответ. Вот что я вижу в настройках своего аккаунта. Но я не понимаю как отказаться от премиума. При это я не тратил денег на это.

Seems that you have been charged already since 04.10.15. Do you check your bank account? But dont worry, there is an option to claim 30 day money back, so contact support ASAP (till November 3).
P.S. I dont want to sound like teacher, but before you accept any deals where you need to enter your bank acc. details CAREFULLY read all terms and agreements to understand for what you could be charged.

Seems that you have been charged alredy since 04.10.15. Do you check your bank account? But dont worry, there is an option to claim 30 day money back, so contact support ASAP (till November 3).
P.S. I dont want to sound like teacher, but before you accept any deals where you need to enter your bank acc. details CAREFULLY read all terms and agreements to understand for what you could be charged.
Thank you for your help. I figured it out. Topic can be closed.
Здравствуйте. Я недавно получил бесплатный доступ к брилиатовому премиум аккаунту. Мне не известны сроки на который доступен такой вид аккаунта, так как он оказался для меня бесплатный. Беспокосюсь, что после окончания перида с моей карточки будет снята сумма денег без моего ведома. Как мне сейчас перейти на бесплатный аккаунт, что бы не потерять свои деньги?