HelloFresh interview questions

Lengthy and asked for a case study to be completed, several rounds with multiple HR professionals. Recruiter kept the process moving along and pressured me to complete a case study over the weekend. Sent out a rejection email after 3rd interview and then called back an hour later to say that that was a " mistake". Very unprofessional and used the case study to gather free strategy. I asked for feedback after 5 days of complete silence on the case study and only received an email back about not being a good match. I urge any HR professionals not to waste time in completing their assignments for free.