Video editing to remove Greenscreen Background

I have a video of a hair care product that I shot on a spinner on green screen. I would like to have the green screen removed and replaced with a white background. I did try this in Final Cut Pro usin I have a video of a hair care product that I shot on a spinner on green screen. I would like to have the green screen removed and replaced with a white background. I did try this in Final Cut Pro using the keyer tool, but couldnt quite get it perfect. Please let me know a flat rate for this project.