It is very difficult finding old tickets in the new IBM support portal. As it currently stands, there is only a search field and filter by status. The old softlayer portal and the "view archived cases" has a much more robust filter option which I used all the time. Since the switch, I (and others at my company), are having difficulty finding older tickets and always resorting back to email.
NOTICE TO EU RESIDENTS: per EU Data Protection Policy, if you wish to remove your personal information from the IBM ideas portal, please login to the ideas portal using your previously registered information then change your email to "email@example.com" and first name to "anonymous" and last name to "anonymous". This will ensure that IBM will not send any emails to you about all idea submissions