Coast Dental Refusal to refund credit. Fraudulent billing Largo Florida

Received new dentures in 2006. Went for a try in for permanent dentures and they looked ridiculous. I told the assistant Gemma that I wasn't happy with them. She said we could do it again but I would have to leave my current denture there for three days. I said I wasn't doing that and left. I left the $1000 credit sitting on my account should I ever decide to have the permanent dentures made. I have never been back to their office.

I'm getting ready to move from Florida to Tennessee so, on May 9th, I started the process to have my credit refunded to me. After they obtained my chart, they determined my credit would only be for $636 because I had the impression done for the new dentures. I don't think so but it's been 8 years so I could be wrong. I only recall having the original one done before every even having anything pulled.  

I accepted the 636. After waiting a month for the check to be mailed I called back and was told that corporate reduced the refund to a hundred and some dollars. What really gets me is that they said I made three visits, one each month for three months. A total and complete lie. If there are records of me making two additional visits they are a mistake at best but most likely completely fabricated.

I have called the corporate customer service number numerous times and just get sent to the voicemail for a Lisa Rodriguez. I have yet to receive a return phone call.  The office keeps giving me the runaround. We are talking about a relatively small amount of money here but I won't let this go after seeing how often this has happened. I can't understand how a company can stay in business with practices like this.