MadEngineer: Was is passed tense. I do apologise for the generalisation as I've had call backs from the mobile team.
But you have to create an entry in your outlook? Wow. Do service providers not realise what a difference it would make if their helpdesk software had a built in schedule or a proper ITIL setup?
As the it guy for my workplace I use such software that leaves jobs open until they're closed with confirmation from the requester but not only that, I make a point of going over the past weeks work and I look for opportunities to make those follow up calls to double check that they're still happy. I see all ISPs now ask "was there anything else I could help you with" at the end of a call. Yes there is - you could help by taking up that promise to call back!
If I can do it, a large corperate can too. It would make a point of difference for any ISP that would implement such a basic service.
I am sorry, I disagree. It's MUCH easier to do things with 1 person who fully understands the procedures, is invested in the solution and controls the entire solution end to end. Scale that to 50-100 people (objections known for being fallible), and the problem becomes considerably.