The HR staff were very polite.

I interviewed at the end of August and was notified about a second interview roughly a week later. However, after waiting a month, it is now October and I still have not received any news. At first, HR said that the department manager was abroad on a business trip and that it was uncertain when they would return. I called several times in between to ask, but was told each time that they were still waiting for an update. Even now, there has been no further response, making me wonder whether they are really hiring...