Yes I'm actually teaching people on how to do things natively without using plugins in RPG maker by sharing pre-made demo files. You can contact itch.io for a refund, it's no good when you're not happy with your purchase. As for plugins, have your checked Visustella's Visual Novel Series?
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I haven't, I'll check in on that. I like what you're trying to do, though it was my mistake for not understanding what I was purchasing. As it's my own fault I don't think it's fair to try to force a refund. Don't worry, I'll still see if I can refer to some of the effects you taught in this anyway because it's not bad stuff, I just sort of already knew most of this.