Hello Dancore, the ticket ID is an 8 digit number that identifies your issue in the Customer Care system. With it the dedicated agents can keep track of your issue and assist accordingly. To find your ticket ID please check your email and look for the 1st message you've received from firstname.lastname@example.org
. That email will contain your ticket ID. Hope this helps!
Also, in case you couldn't contact Customer Care through the in-game option like described in my first post from this thread, you can try using the online support form instead: http://support.gameloft.com/Home/SupportForm/364/