I can only tell you from my experience. Once I have done the interview I will pass it on to my business administrator to do the rest with HR. It would be worth you asking if there is an administrator or PA that you can call regularly to check on the progress. As a manager I will ask the administrator how the application is going. The administrator will tell me if there is a problem with the application or if HR have encountered an issue. Keep in contact with them regularly but if they continue to ignore you then they are not worth working for! Hugs!