Thank you for your comment :) we made an appointment at 16:45 , n I replied you at 16:44 saying I am coming. At 16:51, the trade was fully completed and I went for grocery shopping, which means, I was not late for this trade. Anyway, I believe we just did not have a very smooth communication cause it involves your friend who picked up the book. And I apologize for not calling your friend as I replied you I was coming in Carousell already, thought a phone call to your friend was not necessary.