Bed exercise! Avoid this dentist

I visited dentist in 2022 for my regular cleaning. This is free of charge covered by my insurance. They give me large bill after cleaning explaining I they have to do something special. I never was ask if I approve this. I asked only for regular cleaning.
After I said I don’t want to pay something they didn’t ask me if I want to have, they said I don’t need to pay anything.
After a year all doctors and staff changed and new staff started calling me every week to ask for that payment. And I explained to everyone what happened.
That doesn’t help, they still sending me emails and calling me.

I will highly recommend not to come to this dentist because they will bill you for something you didn’t came to have done!