It needs to heal fully. Give it a couple of months.

You were not pierced by a piercer, you were given a blunt force trauma wound by a retail worker that shattered the cartilage of your nostril.

Go to a professional piercer. Get proper jewelry put in, and have them make sure that it is placed properly. It it wasn't, you will have to let it close up before you can get it repierced.

and whoever told you that was wrong and you need too let it heal longer than two days before you can change it