Promises not heeded

On 12 Feb 2015 I sent OneDayOnly a mail with pictures of a damaged bulb that I received from them after ordering and paying for it. The pictures clearly show that the packaging is yet to be opened, and the bulb has thus not been tampered with in any way. Matthew Leighton responded almost immediately apologising for 'saddling me with a faulty unit', and saying that he would 'strive to rectify it as seamlessly as possible. That was on the 12th. I haven't heard from them since, even though I have emailed several times.