I think that one of the main purposes of the new trouble ticket system is to remedy previous problems with emails not answered, problems allowed to fall through the cracks of the bureaucracy, lack of follow-up, etc. I think the system is a good idea. The trouble-ticket system and organization, consisting of both computers and people, still has some weaknesses, but it takes time to develop and to trouble-shoot a system/organization, and I think they are doing this and they are gradually improving it. The system is not perfect, but I feel very sure that the trend and the intent is toward improvement. If it appears your particular trouble-ticket has fallen through the cracks, then perhaps you should add a comment to it saying so; and if this doesn't work, after a day or two, maybe then you should give them a phone call and let them know you seem to have an orphaned trouble ticket. I would not burden them with a phone call, over a non-urgent trouble ticket, until I was reasonably sure that my trouble ticket has been overlooked.