CAROLINA DENTAL DOCS OF BLACKSBURG

I am on social security, have dental coverage of $2000. I have had lower teeth pulled and half upper. Paid cash $200, $300, now they want $684. Cash plus I still have $903 in insurance. They waited to seat me to tell me they would not finish unless I had $684. Cash plus the $903. Senior citizens shouldn't be treated like this. Very rude manager.