LISTING INFORMATION[ Edited ]
Usually it goes live in few hours.
do you have any red or yellow banner on top of the page in edit mode in your dashboard?
Can you provide a screenshot showing it?
Attention: Google decided in their fathomless wisdom changing in March 2017 their system of notifications about new threads or responses in the GMB forum to a very worst behavior. This way they corrupted my workflow entirely. Don't expect I will notified about any new response by you on my posting here unless you're using the mentioning functionality on your new response - mentioning me per " @[my name]"
Helmut Geissler, Google My Business Top Contributor | my G+ profile
I'm not sure if there is a definitive amount of time (I would imagine it wouldn't take too long), I would double-check that the information is updated in Google My Business. It looks like if some information is deleted it could take up to 60 days... (https://support.google.com/business/answer/3039617)
Question: Is your listing verified? That may also be a factor...