I bought my son a small bag of wholewheat oat biscuits and when he opened them he found an insect web and a whole bunch of eggs. I was going to return it to the store but they will just replace it and throw the contaminated one away. So I e-mailed the manufacturer. I received a very courteous call to say that their courier would collect it, send it away for testing to determine how this happened, and inform me of the test results. Of course they will also replace it.

All in all I was quite impressed with how seriously (and promptly) the manufacturer dealt with this.