I don’t understand this school lol I enrolled my son in summer school because it was available but…

I don’t understand this school lol I enrolled my son in summer school because it was available but they informed parents that three un excused absences will have them removed. At that time I lost the car and it was too hot to walk, I called the school to remove him no issue there and I now received his report card with 12 absences 🤨.