Unfortunately, companies have literally less than zero incentive to be open about their hiring process as that can open them up to litigation regarding hiring p

Unfortunately, companies have literally less than zero incentive to be open about their hiring process as that can open them up to litigation regarding hiring practices. It is common, although unprofessional, to never hear back from a company regarding a role you were not a fit for. To be honest, if one of the coding challenges required you to learn all of Django, clearly they were looking for someone who has experience with Django and not someone who just read the Django tutorial. This tells me that you were likely not a good fit for the role and possibly one of the reasons they didn't prioritize your callback. Id like to emphasize that this says nothing about your skills as a developer just simply how they interpreted your skill set for the role they want to fill. Its best to just move on to a company that does care rather than investing energy trying to convince those that don't that they should.