Outpatient neurology canceled my "week-long" appoi...

Outpatient neurology canceled my "week-long" appointment via my answering machine the afternoon before. I would not have a referral letter from my doctor. I verified this nb. with them after I made the appointment online and stated that I had a referral letter from the specialist v. Xpert Clinic. That was great! Will I now send them a bill for not canceling before 24 hours at the latest? Is the patient's time not valuable? Worthless, worth 1 star, the second star is because Flevo Hospital offers the opportunity to submit a complaint through the site.