Extreme frustration dealing with a claim via email

Discovery rejected a water damage claim for our home. They had about 4 contractors come to investigate the source of the leak at our house. In the end they rejected the claim claiming the builders didn't do the waterproofing adequately. I will fully accept this if they can show me their findings that led them to this believe. But after multiple emails to and through they just keep pointing out the terms of the insurance which isn't helpful at all. There is still water leaking but discovery won't share their finding and they won't help with repairs. I even asked if I could contact the contractors privately but they just told me if I don't agree I can dispute the claim. I'm so frustrated. Also they just keep sending emails. When I asked if someone can please phone me they refused.