Hi Ryan,
That's a difficult situation! Usually, what I've found in this situation is that you have to spend an hour or two backtracking to discover where the name of one business is being conflated with the address/phone/website of the other. This might exist on the company's website or website, or it might exist in citations, or elsewhere. In many cases, this type of conflation is what has caused the confusion on Google's part. It's really important when you have a franchise that you've done everything you possibly can to differentiate the various branches, including different addresses, phone numbers, landing page URLs or websites, content, citations, etc. Even then, Google can sometimes become confused about this scenario and begin merging down details. So, if you can backtrack to a source for this confusion and correct it, that may resolve the issue.
You can also try to contact Google directly about this (go here and click the contact us button https://support.google.com/business/?hl=en&rd=1#topic=4539639) but you may very well get the answer, "That result is generate algorithmically and we can't do anything about it." Might be worth a try anyway.