Any cream that permanently removes hair with one application is likely to be so toxic that you don't need a second application due to death. This sounds like a typical scam. In Australia we did trial a product to make sheep shed their fleece rather than having to be sheared, it worked, but the sheep had a poor survival rate. Laser and electrolysis I'm afraid.
If your body hair is dark on light coloured skin laser can be very effective very quickly and then you can mop up the rest with electro.
