Ya know I never thought about beeswax being used in first aid products! Just another step in my learning curve, I guess! I would suggest looking for a spray on antibiotic. They are just as good as the ointments, but since they are a spray they probably don't have the wax.
Most cuts, though, you can just keep clean with soap and water and keep it covered. Sometimes I use Hydrogen Peroxide too. I have not seen the cut on your foot, though, so I can't offer any medical advice, other than to have it seen if it develops any signs of infection. Take care!