I dropped this girl a note, and now what to do with the situation?

Okay, so I went to Walmart, the cashier was kind cute (but didn't know she was a *****), I end up not shopping but wrote behind my business card saying to call me or text me becuse I would like to know her. After few hours I was driving with friends, and I got a call and it was the girls mom (at least that is what she said), she was like I don't appreciate you giving your card to my daughter, so I end up the call because I was with friends, she called me again from different # write that second when I hung up her first call, and I didn't answer the 2nd call also, anyways I got home like 20 minutes later so I called the number to speak with this (***** claiming to be the mom, that its not her business or what ever and that she is not spoose to call me and stuff, but it end up being both numbers from walmart, so obviously it was either not the mom and the girl her self calling me back from work place or it was a manager or someone that she knows personally I guess) but anyways what you guys think?

I mean I dropped a call and if she doesn't call me or text me then we are good, why is the mom calling to talk to me or I don't know whats the point.

2nd should I be worried about this thing should I go to police or something (because what if they filled a police report?) I mean dropping a note for love is not crime right? what the hell did I do wrong?

3rd I am 24years old I have never been on a date before, but I got the guts to talk to girls in front, asked them write in front of their face for number, or even drop notes like I did, but this is the first time this thing happened.