Guardian cancelled my husband's claim without checking his medical records. Do better. We have children to feed and bills to pay.

My husband was disagnosed with a long term debility in October 2016. In March 2017, Guardian sent him a form that said his doctor saw him on march 3, 2017 and cleared him to return to work on March 6, 2017. the problems is that my husband didn’t see this doctor; he saw his therapist and premidicare doctor that day. I don’t understand Guardian's process for collecting information and making a decision about his claim. They have the right to check my husband's medical records to confirm that he never saw this doctor, but – of course –  they cancelled his claim. He called many times but these people never answer any phone calls regarding our claim. Is it normal how they prolong this process? It is totally unacceptable that this happened. We have children to feed and bills to pay.