Try contacting us here - http://support.chess.com/Tickets/Submit

Strangely also this link doesn't work...I clicked on it and appeared this words:

Sorry, we couldn't find that page.

Maybe it was moved, deleted, or you accidentally mistyped the URL.

Here is the updated link:

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

hi i'm sorry. i have a problem i sent an e-mail to service but noone answered me. i paid for a premium account year 22 euro but after only 3 months i can't use tactical exercise. can you help me? thank you very much Marco

hi i'm sorry. i have a problem i sent an e-mail to service but noone answered me. i paid for a premium account year 22 euro but after only 3 months i can't use tactical exercise. can you help me? thank you very much Marco