Buyer's remorse?
I think that she was the type of girl that likes on night stands or makeout sessions in a club. The ones that don't want to involve themselves in a relationship with a drunk man(No offense to you here, just throwing this out there). It's possible she did give you do wrong number or she regrets giving you the real one, in which she responds that it's not the right one. What you should do is forget about what happened, delete the shit number and move on and continue sarging. I wouldn't dwell too much on it.
I say keep using the same line you used. Try to discern the differences and similarities that it can bring you. But don't do it drunk, be sober and do it with confidence. That alone can improve your chances. Women like a confident guy rather than a drunk one.