Floating horses teeth

Have anyone of you made the big mistake in trusting someone that said they were an Equine Denist and had found out the hard way that they were not. Because now your horses teeth have been damaged and may not be able to have it repared by a registered Equine Dentist. I have and now need to come up with $250 each horse to hopefully have the teeth corrected, if after having them looked at and if at all possiable they can correct the mistake.