My whole entire bottom of my foot has dead skin so thick it's my and so thick especially in between my toes like i took a razor to scrape off the dead skin and it was just so thick i've tried things that you buy in the store nothing works?

Need a scraping from the bottom of your foot to rule out a fungal infection, especially if it's only one foot and not both. If no fungus found then need a 40% Salicylic Acid preparation to use twice daily and rubbed in gently but completely

You may want to try a sallcylic preparation to denude the dead hyperkeratosis. I would suggest that you see a podiatrist who can safely debride this thickened tissue safely and culture the tissue to see if there is a fungus present.