You should be talking about the kind of rubber ones with heels attached! I give you two options, both of which are relatively simple. As for the effect, it depends on your hands-on ability! !
1. Generally, trademarks are embossed. Be patient and use a knife to remove all the words!
2. Fire attack. Just find a metal utensil, heat it, and then iron the words on the trademark flat. If the color of the words is different from the heel of the shoe, use a knife to scratch the words first, and then iron them flat!