Google My Business Guide
If a listing has been created and verified via a bulk-feed then ownership gets a little more complicated. The request ownership process will not work the same way, instead you will need to become a manager of the listing. This requires that you know who owns the listing or verified it in the first place. If you’re a franchise it’s very likely that the corporate head-office has ownership of the listing (here’s great example), in these cases be sure to get added as a Manager to the business listing which will grant you full access.
If you’re at a loss for where to start when trying to figure out “who” owns the listing, re-trace the steps when you first tried to claim ownership of the listing (before you filled out the request form) there’s a little message that says X*****.com has ownership of the listing, if you know the email address (assuming it’s connected with your business) you should get in touch via that email to request access as a Manager.