Business ProfileforFalls Church Modern Dentistry

On March 31, 2023 I had an appointment to replace a broken onlay done by an affiliated office about 1.5 year ago. Under the warranty, I was told I could have it replaced at the Falls Church office for free. During the procedure, I was told I would need a more expensive crown replacement but I could receive a credit for the money I paid for the ($821). The office manager (*****) would just have to talk to the other manager (***). I said ok. After the procedure, ***** then told me that she could not guarantee a credit and I would have to pay the full $1200 amount for the service. I disputed the charge but was told they could look into the charge however I would need to put payment down now and then get refunded later in order to avoid going to collections. I paid half and put myself on a payment plan for the rest. I then receive a call from the office manager ************* was told that I was not supposed to be charged $1200. I shouldve been credited the amount of the onlay and my total payment shouldve been around $380. I was told by *** that I should hear back from the Falls Church office and have a refund credited for the amount I paid. Weeks pass and no refund was processed. I called Falls Church Modern Dentistry and ***** said she heard of no such thing. I asked if she had contacted the manager *** and she said she wrote two emails. She then said if I wanted him to call her, I should contact that office. I told her that it makes no sense for me to be the middleman and she needed to contact that office. I have since sent two messages with no response. I still have pending charges for this bill. Please help me rectify this situation and advocate for a fair billing.