Still waiting for replacement

I purchased a Logitech G930 headset 2 weeks ago and it was delivered last week on the 2nd of February 2015 - I noticed that the microphone of the headset was very loose (looser than compared to other G930s), so I logged a return for the item, as I wanted a replacement.<br> <br> The headset was picked up on the 3rd of February by the courier.<br> I called on 5 February to find out what the status of my return is and was told the courier hasn't brought back the item yet and I had to be patient.<br> <br> I called again today and was told the item was *still* at the courier.<br> <br> Firstly, I wanted a replacement, not a credit and your website only allowed me to ask for a credit when logging the return. The agent I spoke to on 5 February sent this along to the returns department.<br> <br> Secondly, I logged the return on the same day I received the item. According to your website, I'm entitled to receive a replacement *immediately* since it's in the first 7 days:<br> <br> \Our 7-day drop-and-collect replacement promise entitles you to an immediate replacement of a damaged or defective product within 7 days of receipt."<br> <br> It has now been 7 days and I'm still without the expensive headset that I've paid for in full.<br> Not happy."""