@Christina945 I don't get why she insists she has to change the locks? You didn't lose the key or trash the place, your BF showed up and that caused her to lose trust in you. Okay, so if she wanted to cancel you for that, she can do it. But, if there are no damages, then you should get the security back, whether or not it was w/in airbnb rules, and I don't see a need to change the locks. Bizarre.
I guess you have to figure out which way will get you more of your money back....doing the deal w/her or waiting for airbnb to refund you the money from the reservation but not the side deal security deposit.