Wrong laptop purchase

I bought a laptop(hp envy x360 intel core ultra 7 155u ) from Croma yesterday.the display piece was a ultra 5 model with an oled display and a 120hz screen which was the main reason I shifted my focus from the yogabook to hp.The salesman misguided me by saying that the ultra 7 processor is the same laptop only that the processor is better.The specifications of the display weren’t mentioned on the display card either.i assumed it’s the one I saw and bought it only to realise it’s 60hz and fhd+ display. I realised immediately after I bought it but now they’re saying I already signed into my Microsoft account and they can’t do anything about it.This is ridiculous.Any tips on what I can try doing?