I am sorry to learn of this situation.
If your claims are being ignored, but you are represented by counsel, it may be time to consider filing a civil suit for breach of contract, negligence, fraud, and likely several other additional causes of action that are relevant based on the details of your situation.
You may not need to pursue the claim all the way to trial, but initiating a claim (filing a complaint and serving a summons and complaint on the defendant) is often the motivation necessary to move a party that is stonewalling you into doing something.
Obviously you will want to coordinate this move with your personal counsel (this is a huge strategy decision - once you file and serve it is very difficult to "undo" this step), but if you are being blocked with reasonable efforts, it may be time to move to that point.
Filing a civil suit will give you access to additional information using the civil discovery tools (interrogatories, requests for production of documents, subpoenas, and if necessary depositions), it gives greater leverage to demands for mediation, and can help you move the matter forward.