Evan (thanks for the shout out) If you have control of all 3, I’d try changing them all to reflect the most accurate info and wait to see if Google merges them. OR you can begin by using Google call back support and seeing if they will work to merge them on the back end for you.
Definitely don’t mark the 2 duplicates as closed. That would tank your ranking 🙂
Call or Tweet (twitter.com/googlesmallbiz) Google My Business and ask them to merge the 3 pages. I would definitely suggest you call because if Google catches you with multiple listings for the same business they can suspend all the pages and you don’t want that to happen.