Landlord insurance issues , also sinkholes worries!

Hello all,  So happy to have found this great forum . 

Anyway,  I'm having difficulties with my insurance company, at least that they decided to drop my insurance due to some vague issues.  

 My question is , what are some reliable insurance companies in Florida , that are also highly likely to provide sinkhole endorsement coverage?   Many companies seem finicky about sinkhole coverage. 

Thanks :)