Sound advice from all. Unfortunately I have paid up front for my training (maybe with hindsight a bad idea). I'm not loaded but decided to use a house deposit on something more worthwhile!
Obviously the best thing for me to do is change to the other instructor immediately. I may do this on the basis that I would like to 'draw from his experience'- which maybe more tactful (small club etc.).
Although I subscribe to what you are saying WWW about CRM (quite an interesting way to look at it), if it were on a level playing field ie both employees, this would be OK. Most people have to deal with awkward people in their jobs and it is a skill to manage this relationship. However at £82 per hour I think this falls more into the customer / client scenario. Interesting angle though.
Short of getting a refund and going elsewhere (thanks NigelS) I think the above is the best way forward.
Cheers for all your input Gents - maybe we should archive this for anybody else with similar concerns.