Asus mislead me into buying an inferior product

They mislead me into buying an inferior laptop than I was intending to buy and trying to blame it on me even though they admit they have a fault in it. Their online ad and invoice they sent me states the laptop I thought I was buying, but they claim I should have seen from the product code that it wasn't what I was buying. And trying to blame it on me is the worst of it instead of acknowledging it's their fault makes me even angrier and suspect even more it's a sales tactic and NOT A MISTAKE. Never buying an Asus again.