OfferUp Purchase Gone Wrong

Demi💋 • Jerseygyal | Mom of two kings 👸🏽
So I purchased a car seat carrier from OfferUp since I don't need a transition stroller. I never double checked to make sure it worked correctly before I bought it last week and I'm just now getting around to trying it out. I spent $35 to only find out the correct button that unlatches and opens the stroller up, doesn't work. I messaged the lady just for her to say I have to use the clamps on the side (which is very inconvenient).... Like how do you not mention there's a flaw in the stroller before selling it? I asked for my $ back and of course she's now not responding. Would I be wrong to pull up at her house? 👀🤔