Shit I accidentally deleted my comment. Ok well let me rexplain - It seems to me you're using the lines here with no context or knowledge in terms of when or how to use them. Snapchat isn't like tinder or Instagram where you need an opener to get the conversation going, I've found the most success by just snapping back and forth with a girl (good photos with decent lighting, none of that forehead/ceiling shit).

She isn't giving you a surprising amount of shit because she literally doesn't know you. She could have just gone through her quick adds and added you because your name sounded hot (yes this happens a LOT more than you'd think).

Snap back and forth with her, get to know her and crack some inappropriate jokes, get a fun flirty vibe going and escalate from there. Most of the common-sense rules (double texting, calibration etc.) still apply but no need to treat snap exactly like tinder and do the same exact thing because you're going to end up in situations like this one.

I agree with Max here, challenge her back a little and see if you can get some banter going. I would go with "Prove me right and show me then" or something - you don't want to come off as creepy. You could also just try and move things forward like I said some banter/qualification - ie: "Fair enough, you're not a basic white girl tho are you?"

Hope this wasn't too harsh and goodluck mate.