Zalando Backend Engineer Outfits Program interview questions

I received codility task and after that received invitation for interview. There was technical issue with system and on the time of interview no one showed up. No answer to my mails. No answer to phone calls. Recruiter explained to me that there was technical issue and she was on her annual leave. We rescheduled and she said she will send me invitation to next interview. After few days I didn't received any invitation and decided write email to check if everything ok. I received auto-reply about annual leave this time. After a few days I received invitation where I picked available time slots for next interview. After this I never heard back from company. I also wrote mail to be sure no technical issue this time. But unfortunately I never received any answer.