Loblaw Digital Android Applications Developer interview questions

First, I got a phone call from their HR department to talk about my resume. We scheduled a technical video call with the lead Android developer in the same week. The technical interview was not very hard. I was asked about some popular Android architectural libraries and principles. And the lead developer was very pleasant and easygoing. I was supposed to do a coding challenge after that interview, but I never heard from them again. Even after I contacted HR, and after sending several follow-up emails, they never responded.