Please Pray for the following... *read description*

My great grandma had a stroke earlier, and she is in the hospital. My grandma (not my great grandma) who raised me is going into surgery. The doctor believes she'll be fine, but there's always that chance of something going wrong. My dad figure is also in the hospital over his legs. They think they found a cure after 10 years. This could be his last hope. He's close to giving up because he is already near his death bed due to his legs, so please pray for all three of them. I don't know why this is happening to my family. My great grandma and grandma are Christian. They pray, and they have a relationship with God and Jesus. My dad figure said he believed, but ever since his legs started acting up, he's been mad at God. Any advice or words of wisdom along with prayer would be appreciated.