It does take some time once an issue has been narrowed down to a gateway/server issue.
Just stay on top of the subject.
Lots of bad weather at some gateway locations right now that could impact things for a short period.
It does take a while and it does take patience .. Engineers move at the speed of Engineers. I guess the biggest thing is to make sure the changes they make fix the one thing and not break several others in the process.
Such is the way of Networking.