Bandsintown interview questions

It started super common, had a very good interview by phone with their Mobile Tech Lead, everything seemed fine. He asked me to do a code challenge by building an app with 3 screens, saving data on core data, making network requests to get data and do one of the screens in objective-c. Which is not a small piece of code to complete, this required a couple days to be done and tested, etc... I submitted and that was it, I never got any status update. After 1 week I sent an email asking for update, they said they would check the code at the end of the week and get back to me on the next week. Next week came and nothing, I sent another email, they said they still had not gone through and were doing it that week. And never heard back. It's been a month and no word from them. I just feel brain raped where they made me do work, I have no idea what they will do with it, and never wanted to follow through. A simple email saying anything would have been better then asking to code for free and get nothing in return, not even a "thank you, but..."

The phone conversation was very straightforward - they asked me to describe what I do currently, and how my skills can be applied to the position. Then they opened up room at the end of the phone interview for questions I had for them.