Any Chance I Might Get my Money Back?

Talk with your orthodontist again. I doubt if he "assured you" that his treatment would definitely cure your TMJ symptoms. I have been treating TMJ patients for many many years, and NEVER assure anyone that it will definitely work. TMJ is a very nebulous area and there are many different approaches to attempt to alleviate the symptoms. I believe in Neuromuscular Dentistry, which will attempt to cure the TMJ symptoms BEFORE moving teeth around.

Maybe you should have a talk with your orthodontist and let them know that you are still having TMJ problems.  I think the main idea is to get relief from the TMJ symptoms.  You may have to alter treatment. When I go to a physician with a sore throat and they see white pustules on my tonsils, they assume it is a strep infection. They may prescribe an antibiotic like penicillin. I pay for the doctor visit and pay the pharmacy for the prescription.  After three days, my throat is still sore, so I go back to my physician. This time, they do a culture to isolate the bacteria and see which antibiotic would kill the bacteria. They prescribe a new antibiotic. This time I pay for the doctor visit, the lab culture and the pharmacy for a new prescription.  Should I ask the physician to refund his fee from the first visit and ask the pharmacy to refund the first prescription since it did not work? I am not sure of your logic. I do know there are no guarantees with any medical treatment since there is such a wide range of responses to treatment dependent on the uniqueness of the human body.