PLAY.COM how to write a feedback about a seller?

[WhiteBears]

well i ordered form this seller on Play.com on the 25th August, should only take 5 days to receive it, ok there was the bank hols and weekend, but i should have received it by now. The status says 'packing' but that was there since last week!! i have emailed the seller several times and i am getting no response, he/she has taken my money :(

i have read the feedbacks from other buyers and has received some negative feedbacks but i thought it was just a one off, but no, So i want to write my negative feedback about this seller but i cant find the 'give feedback' button, do i have to wait until they send it before i can write one?

[4getmenot]

tis holiday season, they may have gone away