No feedback on ongoing complaint from 2024

If I could, I would score them less than 1 star. Ongoing correspondence with Momentum Health since 2024 regarding an unpaid claim. Authorization was provided by Momentum (auth number on doctor's invoice), yet they claim the procedure WHICH THEY AUTHORIZED is not covered on the plan. NO feedback, NO explanation, just an unpaid bill leaving us with debt and legal threats. We will be changing from Momentum to another more competent medical aid where they care about their members. Will ensure we spread the word about how truly bad and shocking Momentum is.