For me, I understand mistakes happen and am always willing to work things out and wait patiently for a fix – especially for a profitable affiliation of 5 years.
My biggest issue (other than the large loss of revenue of course) is the fact that they tell me everything is fine and has never stopped working perfectly. To me, that is just plain old lying – something I have very serious issue with. Their dishonesty about this situation is the thing that gets to me the most.