Shelton Family Dental

On August 29 after finishing a dental procedure, I was given a follow up appointment date for September 6. About 3 days before the appointment I received a reminder call from Shelton Family Dental's office in which I let it be known that I would not be able to make that appointment. They still charged me for that. They then decided to reschedule me for a date I already had a doctor appointment for without my approval. When I could not make that appointment, they charged me for it. I feel like I should not have this bill because of issues they created.