InstatTox on neck

I have not been on here in years. Tried uploading profile photo that met the parameters, but it refused to load. Anyway, I need to temporarily firm up my neck, get rid of crepiness, one ring ling, not deep. Do I get instatox or that infomercial product I see used on undereye circles? Anyone used both? I think it starts with a p. Cheers, Lora (formerly Lulu on Beauty)