Ignoring Calls and emails

I sent initial query on 20th of January still Dischem Health cannot answer my queries. They changed initial policy to what suits them.,but I got copies of initial documents sent to me on 6th of July 2022.Im really disappointed to see that a life means nothing to these human beings. Private hospital is sending me emails for the bills and they refuse to pay it. Since my Dad was active on 1st August 2022 he never used no benefits at all. This is the first claim and the ignore my emails and telephone calls. This is unacceptable behavior.