How to deal with a potential employer who keeps disappearing?

02/02/2016 So I randomly applied for a particular position at this company, and I immediately got a response which read, "Hey...perfect timing. We are about to start the process of hiring someone for that role. Will call you in for an interview soon".

This is was followed by a 2 week silence.

15/02/06 I send in a follow up in the same email thread asking if they are still looking for someone. No Response

17/02/06 I follow up again in a new thread and I get this response:

Hey...Sorry I haven't forgotten you. Let's get you in for an interview next week. Can you please touch base with me on Monday?

22/02/2016 (MONDAY) - As requested, I email him again asking for his availability, and now he has stopped responding again.

I've been tracking all these emails and I know for a fact that they are being read. Should I give up on this job and move on? or should I keep hounding this company?