How long can homeowner insurance hold up a claim?

Our home was broken into in broad daylight and no one saw a thing. I was contacted my police whom informed me that our home and been burglarized. My husband and I were both at work and our children were at school. The neighbors found our home totally exposed both front door kicked and and garage wide open. Now the insurance.company has hired private invesigators to question my husband and I. I just don't understand. We are the victims. Everytime we enter our home with our young children we are reminded of the intrusion to our home. What can I do to protect my family's interest in this matter. We have no tvs, computers, stereos, NOTHING of value. They even took my cd with backup family photos that can't be replaced. Insurnace cmpany has done NOTHING to hep resolve my claim. What are my rights?