I cannot verify that Warrant-EASE has ceased operations. However, calling the telephone numbers listed for the company results in a "the number you have reached is no longer in service" announcement. This is not a good sign.
Assuming that Warrant-EASE has ceased operations and declared bankruptcy, you have one recourse and that is to find the bankruptcy trustee who is handling the case and file a claim. Your claim would be unsecured, and would stand behind secured creditors. It is unlikely that you and fellow consumers would see any reimbursement from such a claim.
Regarding your question about a refund from the dealer, I do not see a claim there if the dealer was acting as an agent for Warrant-EASE. Review your contract to see the structure of the agreement with Warrant-EASE and the dealership. As a practical matter, it is likely that the dealership was left holding the bag on repairs it made under warranty and that Warrant-EASE failed to pay when it ceased operations.
I hope this information helps you make better money decisions.