how to give a feedback to seller again

[smeetsavsani]

i gave nagative review on my last purchase of blackberry Z10.seller contact me and told me that''i will arrange the pickup of the product on thursday..but didnt arrange..and i called the seller several times..he did not answer my calls..the product is defactive..phone did not detect sim cards.

[smeetsavsani]

seller contact me and forced to remove my nagative feedback..and i removed..and now he did not answer my calls..so i want to know how to give him another feedback again..??