APEX Expert Solutions Software Engineer interview questions

Had an interview with the Head of Software Engineering. The questions mainly focused on hypothetical situations and what I would do to solve those problems. I thought the interview went really well. Afterwards I was told that I would be receiving an offer from them shortly (they even asked for my address to put on the offer letter), but I never received it. I messaged my interviewer on multiple occasions asking if there was an issue, or if something was wrong and was completely ignored. Not even a courtesy e-mail saying that they were going in a different direction. A couple of weeks later I saw the same job re-posted on the same site it had been on originally. I sent another message, as well as re-applied for the position, but once again received no response.