Rewards Network Software Engineer (Scala) interview questions

Contacted by their recruiter via LinkedIn, Who left the company during my interview process. After initial phone screen with hiring manager, they sent a coding problem, I solved it, code was solid I knew it (Unit / functional tested). They did not get back to me for 10 days. When i asked, they said they are moving with other candidates. Pretty sure thy don't have enough technical expertise to identify right candidates. Would recommend to stay away. Very unethical interview process.