Probably not what you want to hear, but we're a Diamond Support customer and don't have these issues, generally speaking.
Account Services can sometimes be a little slow on licensing, but they generally get back to us same day if not early the next day.
We get a dedicated engineer who learns our network and we can usually get that person on the phone in a matter of minutes and they can be available for email for super simple questions.
There's lots of other benefits to Diamond. May be worth checking out.