Tesla Test Engineer interview questions

I had my resume in their system and also had a copy forwarded to employees by co-workers who knew people that worked there. I was contacted by a general hiring manager who didn't seem to know much about the jobs I would be applying for, and they just asked about my resume and past employment history. I got passed onto the next hiring manager who was responsible for the group I would hope to work with. The questions from this hiring manager were much more specific and delved deeper into each item we discussed. I didn't get to hear about what would be expected of me in the positions, or much about the opportunities.

An HR rep emailed me to set up a phone interview the next day. Interviewer missed the first appointment and after I contacted him, he setup another interview for the following day. He missed that appointment too and finally called about an hour later. The interview went pretty well and lasted about 40 minutes. At the end of the interview he told me they were interested in proceeding to the next phase which would be another phone interview with him, his manager and possibly an engineer from the team the position was with. This was 3 weeks ago and nothing has happened since then. I have sent several emails and left a few messages on his voicemail and haven't gotten any response at all.