Can I ask what the background was? You say that you finally gave in, so what preceded it? I'm curious, because a 'gesture of goodwill' in the amount of 2,500 pp would suggest (to me) that it was something very minor, like an overhead light not working (though I gather you didn't fly.)

The bit about 'we won't be responding any further' suggest some heated letter exchange. Is this the case? I have to say, on the face of it pretty poor.