Grillz Not fitting

Hey yall, new here and just wanted to see if anyone knew what can be done with grillz that don't fit anymore. I have a 8 tooth grill that I have not worn in a long time and my teeth have shifted. Got them right after I got my braces removed about 2 years ago. Is there any place I can send it to get some money back? Any place you may know where they can be adjusted to fit now? Any input/advice is greatly appreciated!🙏