While email has its uses, it can be very easily ignored. A phone call, on the other hand, is your chance to directly engage with the person on the other end and - short of hanging up on you - they've got to listen.
Therefore, it's the perfect opportunity for you to bring them round to your particular way of thinking - and this excellent infographic, put together by management consultants The Gap Partnership, describes the subtle and not-so-subtle methods that you should employ to achieve this.
Nonetheless, if you're trying to get people to reclaim missold PPI, we suspect that could try every single one of these tips and you'd still get shouted at.
Read on to perfect your phone patter and click on the image to enlarge it.