Zero correspondance. Poor form.
Had a job interview and was told I'd hear back by the end of that week... 3 weeks later I hadn't heard back and the job was still advertised online. Its now been 6 weeks, and the ad is finally gone, but I haven't heard anything back from anyone! The courteous thing to do would be to send out a rejection email at least. Shame on your manager/HR/recruitment team. I've worked for COG before and this is not the first time that communication has been nil. Sort it out.