Go kick him in the boing loins

so i trated this guy his name was sqare the time but then he was like going to trade me my his knife for my redline i called her bianka so she was dear to me like my daughter and so then he said i trate you but you give me redline (bianka) first and then i will give my your knife for your bianka and i will look after her so dont worry it is good deal it is better for you so i said ok please thank you a lot you are good ok so then you said you are going to be a god trader then i gave him my redline bianka and he never gave me back my his knife please i just want bianka back pls