I finally got a reply from BA.
Thank you for contacting us. I apologise for the delay in replying to you.
Your claim for compensation has been refused because flight BA0027 on 09 December 2013 was delayed due to unexpected flight safety shortcomings, which prevented the aircraft operating as scheduled. Under EU legislation, British Airways is not liable for a compensation payment in this situation.
During the final maintenance checks, we discovered a problem with the nose gear door. There are numerous parts that the airline may be required to replace within a specific timeframe. These parts are kept fully stocked and ready to fit. As this particular ‘part’ was not due to be replaced, this constitutes as extraordinary circumstances.
Unfortunately airline operations are subject to circumstances outside the airline's control. British Airways takes all reasonable measures to avoid delaying a flight in such circumstances. Consideration is given to whether there are any operational options available before a decision to delay is made. We are sorry that the delay was necessary in this case.
Thank you for following this up with us. I do hope we have the chance to welcome you on board again soon.
I honestly thought that I should be compensated because of what had happened during our flight. There was a technical problem that dragged on for hours while we were all waiting inside the aircraft from 9pm to around 2 am. And the pilot himself told the passengers during his first announcement that they could transfer us to another aircraft but that it would take around 2 hrs to transfer so we might as well just wait for the engineers to fix the problem for an estimated time of 1 and a half hours. But it dragged on and on until 2am. Until they finally decided to delay our flight the next night.
What should I do about this? Should I pursue it? What can I possibly reply to them?
Thanks in advance.