Coast Dental -Dr. David Krickl and Brenda Refusal to refund monies paid for non-performed services Sarasota Florida

We received a refund of $1734.00 from Coast Dental which was $159.00 short of what was owed.  When contacted, the office manager stated that my father was being charged for "Chair time and the cost of taking an impression".  They are refusing to refund the balance due. 

 On 5/20/13, I was finally contacted by the Coast Dental office manager, Brenda, who informed me that it is going to be an additional 12 weeks for my father to receive the $1,893 refund that he paid them on 4/11/13.  She asked for my father's credit card number, again, and I reminded her that I had given her that same information during our conversation on 5/6/13.  She said that she had no recollection of me giving her that information.  I have provided the Tampa Business Bureau of my problem with Coast Dental.  According to their website, they have received 448 complaints concerning Coast Dental.  Buyer beware.