I just played this game this summer
Find the cheapest full coverage policy you can
I rock State Farm
then go get three separate appraisals, does not have to be much more than a dealership stating it’s value all the way down to a real appraisal from an appraiser
the only thing hey can do at that point is honor your appraisal value. It’s a third party statement on the vehicle done three times.
then insurance gives you what you want/need, not your fault they undercharged you for the proper insurance, they even take pics and know what they are insuring before giving you a full coverage quote