Facebook Scam

So someone purchased a PS4 I posted on facebook using the shipping feature through facebook. I sent everything out and today they send me videos and images that they didn't get the proper contents. This is an obvious scam as I sent the PS4 and all the contents I was supposed to. This person appears that took off the label and put it on his box and is blaming me for scamming him. What can I do in this situation?

Advice is appreciated.