Hi Barbara,
So sorry to hear of your experience with this dentist and I agree this should not have happened. Your dentist should have provided a written treatment plan that included a breakdown of all the costs. In addition, the planning procedure before dental implants would have enabled them to calculate the correct number required. I’m not sure where you are located, but I would suggest contacting the dental association for your country and asking them for advice. They will be able to review your case and help resolve this issue.