Uber Software Engineer - Integrations interview questions

I interviewed with Cornershop, a startup that got acquired by uber. The interview process was very unprofessional, the interviewer did not show up and without responding to my emails scheduled a new interview. After that, I was given a programming project where they gave me 5 days to complete. I finished in 4 and I shared the project with HR and the team. They did not acknowledge any of my questions or my project until 7 days after I have shared the invitation just to inform me that the invitation to my project had expired. This was not uber itself, but I hope this does not happen once uber is in control.