Filler around corners of mouth ruined the tissue inside of my mouth and lips what can I do?

As he injected the product I could feel the inside of my mouth splitting the skin on the inside of my mouth. Since then I have had lumps on the corners of my mouth along with stretched out tissue looking like the inside of my mouth has been split open. I Have lost all volume on the corners of my bottom lip nothing to hold my lip up on its own but my teeth. I have lines on the side of my mouth dark shadows that I never had before. Not to mention the constant pain I feel on the inside of my mouth.