Who called from 4156897515

Bad PERSON used this number to send code of verification..... LOL.... the people using these numbers are using your number to hack your accounts..... so to prevent this from happening, DO NOT give out codes to people you don't know.

PLEASE HELP~!!!
I was selling iphone on craigs list and they acted like they were buying, anyways they called me and gave me 4 digit code and I texted them back with the code....They told me that they are gonna send someone in to buy the iphone with four digit code and they never came..
.What did they scam from me?    
all i did was give them back the code they gave me..

they called me and gave me code & texted them back with the codes... does that mean I'm already S.O.L????

Receives a call 1/24/15 am.  It left on my recording:  press 2 to connect etc. Same.  No premeasage who it was or for what.  I just deleted message.