he said he will pay "hujung bulan", hes delaying things for sure..takkan la xde mak, bapak, adik, abang, makcik, kwn2, go borrow from them le..dapat gaji then pay back ur friend/siblings le..dont make the buyer wait le, very unethical..

did u make a police report yet? if so time to start digging his details, better try finding his parents or sibling details(is it possible?).
if TS manage to get that, next step should be a walk in a park..