A driver left my teen for 50min

I have been using Uber Teen for my son for over a year so he can stay after school when needed. I’ve only had 1 bad experience, otherwise my experiences have been fine.

Today a driver claimed his ride and appeared to pull over 5 miles away and sat for 40 minutes. Frustrated, I messaged the driver and asked if he was still picking up my child that was waiting at school. He then drove 9 miles away and parked again. 5 minutes later I messaged again asking him to pick up my child or release the ride so another driver can pick him up. 5 minutes later he gets a new driver. 50 minutes of my kid waiting outside the school.

I am frustrated with the driver and the lack of communication , in the future do I cancel the ride and dispute the fee? I don’t see anywhere on my app to contact them.