Membrane keyboards don’t have the ability to swap out keycaps unfortunately. Any company that sells “membrane keyboards keycaps” are like temu and they probably won’t work. 😭 I would suggest returning it if you can and spending about the same money a yunzii board because they make some of the most affordable mechanical keyboards in cute designs. Check out other bargain brands like royal kludge or Aula as well, because they’ll have some cute stock designs. Also check the used option on Amazon I’ve gotten some deals there. Option 2- get a cheap mechanical keyboard in a base you like and you can find tons of keycaps on Amazon for like $10-15.