There is also a scam. I know the case where buyer also bought a model and than imidietly asks for refund with explanation similar like in your case. He "thought" that this is the real thing, the thing that gave him up is the fact that he downloaded every single format available. On other hand buyer of your model in review wrote : "these people would not issue a refund because of a simple mistake." So I don't get it, is authors fault that you don't know what are you doing ? Is it author fault that you don't read description, so it will be best if author (seller) think instead of a buyer so he/she doesn't made mistake...