My orthodontist is charging me for braces to fix his admitted mistake. Now those braces are hitting my top teeth? What can I do?

My bottom permanent retainer broke after 25 years. Saw a friends father that was a local orthodontist. He glued in a new one(discarding the metal of my old retainer). The metal he put in was malleable. I flossed that night and the bar bent causing tension/pull on the two eye teeth and causing my tooth to go crooked. He now is charging for braces to fix his error and even tied filing my tooth down ruining it's inegreity. What can I do?

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