Aspen Dental – Horrific experience - don't want to even give one star!

My elderly (87yo) mother went to Aspen Dental in Marion, Illinois. They took out her tooth and told her she owed $180 when she left. She got a bill afterwards for another $29.00. When I questioned the additional charge...in person...(after she paid for what they told her she owed) the "supervisor" got hateful. I called customer service three times to only be told that she would be responsible for the remaining $29.00 because she signed a responsibility form. No insurance was involved...cash only. What keeps them from charging her even more once the $29.00 is paid? When she went to another dental office to get a second option on an implant they informed the new dental office that they would not share her x-rays because she owed the $29.00! If she owed the $29.00 they should have told her the day of the procedure and she would have gladly paid it! Extremely poor customer service, nasty storefront (literal filth), and hateful staff!