Is the Catholic Church the only and truth religion and saints have special magic powers?

I am a former Catholic. When I was a little girl I used to believe in it. Going to church first communion ok. One of my family members got seriously chronic health issues sadly that family members past away. I remember each and every morning I would pray to the statue of Mary to please heal that person begging and crying. Nothing happened horrifying experience things happen to me. I remember my aunt would give me the song of the cross and nothing. I asked statue for the best health well being on my family members nothing no answer. My grandmother this morning told me that statues do perform miracles but I after my experience and I was hurt by the church Catholic people that I lost faith. If the Catholic Church is truth then why horrifying things happen?

Is the Catholic Church the only and truth religion and saints have special magic powers?
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