I have to say I was very happy about the van my so...

I have to say I was very happy about the van my son was getting to school but I think it's unfair when the van is 20 minutes late and then leave after 2 minutes and then call me after they leave and not before . For months now no problem intil the day they were late and want to blame me for not being outside when I was on time and they weren't . The driver didn't want to answer when I asked why?. Poor communication