Worst company ever

I've submitted all the forms required to claim only to be told it was declined something about not paying for it I should ask my HR imagine 4 years of paying for this and they had the audacity of telling me about adding my son. That time their scheme doesn't cover anything I had told myself when they pay I'd take him to the doctor. I have never been so hurt,angry,frustrated WORST company ever. All I want now is to just cancel it and pay thousands with decent companies than Momentum Health4me because they failed me told me about something that was added then canceled with no communication or anything