The recruiters are notoriously tough to get into contact with. My first scheduled interview, the recruiter did not show up. I then had an interview that I thought went excellent but head silence for 2+ weeks until the recruiter ultimately told me they were no longer searching for the position in a mass email. Although my experience has a negative outcome, I'd heard from connections that recruiters are often not very responsive and they had been surprised to still be in the running after not hearing from recruiters for weeks.