plz help me my google ads account is not work

When i am going to login into AdSense account a message display
"Account Not Active An AdSense account does not exist for this login, as it is associated with an unapproved application. For more information about your application, please review the message we sent to the email address you provided with your application."

what i do , my account is not active for a long time, hoe to get it active plz tell me, i m new for this