First, they don't have the money to refund anything. They were barely paying the bills.  They had very little in reserves which was eaten up quickly when they paid for an estimate to see what can be done to repair the dome.  

The insurance is denying the claim due to failure to follow maintenance guidelines thus leading to the collapse.  Most of the material is no longer usable and would have to be replaced in order to reinflate the dome.  

At this point, unless a lot of people and businesses donate to the dome, it will not go back up.