Have you received a denial letter from the WC carrier, denying any further liability for your injury, or are they simply not paying? If the former, then presumably your group or private medical insurance will pay the bills under the terms of that plan.
If your lawyer won't return your calls and letters (which I find unconscionable), then it may be time to seek yet another WC attorney.
A person, who is nice to you, but rude to a waiter, is not a nice person. (This is very important. Pay attention. It never fails.)