FPT Software Bridge Engineer interview questions

I applied for Software Engineer for placement in Japan through LinkedIn. There was 2 interviews in Japanese. 1. HR interview, 2. Interview with Technical Leader (there were 3 interviewers, all Vietnamese). Unexpectedly I got an offer. I accepted, but 1 week after I accepted the offer, the recruiter didn't reply to my message. Kinda feel scammed by the recruiter, because I rejected an offer for another company over FPT Japan's offer. BE CAREFUL to trust the recruiter.