Returning my Nexus 4 was a traumatic experience. It took over a month, with far too many emails and phone calls. Sadly, the customer support staff are probably trying their best, but the information and systems they have are completely inadequate.
Finally I just had to be obstinate and say "I want to speak to your manager." over and over and over again until I got to someone who knew how to look up my support ticket and see that I had started the return process before the deadline. Eventually they sent me the info I needed to return the device, but by that time I was so scared I would send it to them and then not get a refund that I chose to sell it instead.