Why Consistency Beats Volume
In the ordinary case, the businesses that win here are not the loudest, only the most consistent. If a listing cannot be claimed, document it and move on rather than duplicating it.
The pattern repeats: the businesses that audit before each campaign are the ones that stop worrying about it, which is why it keeps being rediscovered. Keep the record clean, revisit it every month, and most local problems solve themselves, once the obvious errors are gone.