When did you email them??
Give them a couple of days before leaving feedback.

I just sold my playstation and forgot to send the power chord.It wasnt in my photo of the item either as It was still plugged in beind the tv. The guy msgd me and said could I send it or if it is missing could I pay for the replacement part. I have sent it today.

What I am saying is that it may have been a genuine mistake. So give them a couple of days to get bac to you and if nothing then leave neg feedback.