answers

1. 你說A把地板磨光打蠟之後請的B，B又怎麽知道A曾經弄壞了地板？ Because payment from A was directly sent to B.
2. B提及A的目的是什麽？ I believe his purpose is not to pay his damages. He blamed A did everything.
3. 你和保險公司的矛盾到底是什麽？B's insurance just listen to B's lies, not to see the fact.
保險公司拒絕了什麽賠償？They rejected B's liability on every damage B did include the room B damaged.
你說的"全房間磨光打蠟的錢" 包括A弄壞的房間地板還是隻有B弄壞的一間。 Entire home.

Thanks for asking. Hope this is clear now.