Hi there, I wish get admin's answer. I prepare to have a one month try Diamond membership, question one is can I download the video lessons on my device and watch it offline? Question two is whether the pay is a subscription? I am not a native English speaker, I hope make my statement understood clearly enough, if I pay the membership for just one month, do u charge the fee automatically on the next month? The underlying point is I want decide on which particular period I pay for the membership rather than being charged automatically and only request can I cancel this automatic payment. Many thanks

1. Video downloads are not something that is available. There may be a technical method to do it but nothing the site supports or probably would like people doing.
2. Memberships are subscriptions and renew automatically at the end of the term, unless you cancel renewal.

hello there..

at 28/2/16, I agreed for a 10 days free trial in diamond membership.Today I discovered that I have paid for a year and I can't cancel it. I want to cancel it today,not in a year,what do I do? and it's not free.. this is a total fraud 

There is a 30 day money back guarantee if this would be your first time claiming it.

https://www.chess.com/legal#subscriber

You want the section labeled refund.

well, I've already done that.. and the message I got was this:

Your Premium Membership is already set to end on 2/28/17. Please contact support if you have further questions.

and when I press contact support, I get this message:

Missing Page?!

Somebody made a dubious move... and the page you attempted to visit cannot be found! It either never existed, or has been removed.

If you think this is an error, please contact us!

and so on.............. THIS IS A TOTAL FRAUD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! SHAME ON YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Which version of the site are you on? 

Anyway, just open a ticket and choose Billing for the area. Account might work too but I think the other is right.

https://support.chess.com/customer/portal/emails/new

ok,thank you very much! I 've just sent them an e-mail and hope that they will solve my problem

It may take a little time to get an answer but usually things get handled.