Happier Living review: Not to be charged 2

I called a medical facility to confirm they accepted my insurance. They said yes. However, the only way to make an appointment is online once you register. So I registered and I was given a choice to choose my insurance provider and the person on the phone said to pick Aetna since they are the parent company of my insurance provider. So I did. Once I scheduled the appointment I got notice at 5pm that afternoon stating they don't take my insurance. So I cancelled immediately and now they are charging me $500 for an appointment I did not attend and cancelled. They have a 24 hour cancellation policy but there was no way for me to know they did not accept my insurance.