Is it possible that a neurofeedback “specialist” is causing damage to scam me?

I had a neurotherapist. I had never done neurotherapy. Never experienced these symptoms until working with him. It just got worse and worse. I approached him about it and he just said “ohhh okay I think you have to split eye syndrome (have no idea what that means) My best friend is a great optomologyst” It almost seems like he was doing it on purpose. All his reviews are 5 star out of 35 on google… which is kinda strange, one review when being an employee on another site that said lack of training was an issue, and I cant find anything proving his certification other than his own website (which my parents buy). I need to look into this guy. I need to do something about this. I don’t know what or how. With the equipment can neurotherapists mess up the connections and your eye functions in regards to my brain? Could they scam me this way? How do I proceed if he messed me up for life?