Question for Christians/born again: What will you do if you are in my shoes? Or have you experienced the same situation?

Details: on last minute I was assigned to play the hymnal for our church service because the assigned pianist was absent. All I did was to practice the song. Once I was on stage and played the song, I didn't know that the hymn was change last minute. When I was on my 4th stanza, someone walked to me and talk to me, while I was playing. I can't understand what's happening, I thought everything was fine. I started to panic because it feels like there's something wrong.

After the service, someone told me that I played the wrong piece. However, our music conductor defended me and said that I played the right song, since it was written on the schedule. But in the end, they kept telling us that the hymn was changed last minute and we should've asked them (the media team). Like, how will we know? Lol

So here's the catch, I was not on the lineup of Instrumentalists for the 2 consecutive week. And I will not even take part to our anniversary.