TradeHero IOS Android Developer interview questions

I was shortlisted. I was given link to a Codility test which comprised 4 coding problems to be solved. I got 390 out of maximum 400 score in Codility test. I was invited to come to Singapore for a face to face interview with the CTO (I was in Malaysia back then) because they said my Codility score was the highest among all the candidates. I had to take one day leave to attend the interview. The company office was located in a rather dirty and messy building (kinda like a warehouse), the interior was untidy and employees were wearing very casual clothes. I met the CTO and he said they were working there temporarily until they can find a suitable office. I was interviewed in separate room by CTO and two other technical guys. There was no special question, they mostly questioned what I had done at work so far and whether I'm willing to learn new technologies (of course I am). Interview only lasted about 15 minutes, they thanked me for coming so far for the interview and said they would review my application again and update me afterwards. I went back to Malaysia. There was no news ever since. I followed it up. They said they wouldn't proceed with my application, without stating any reason why.