Tend Skin, where to buy (store)?

Hello, just wanted to get some feedback on Tend Skin. How do you properly use it? From my understanding, after i get a waxing i will have bumps on my skin for 2-18 hrs. Applying Tend Skin afterwards will reduce these bumps, is that correct?

Does tend skin work after shaving my chest?

Finally, where would i buy tend skin. Time is of the essence so online won’t work. I live in a fairly big city, Denver Co.