I am quite enraged!
Our caravan is in for a service and we have just had a telephone call to say it is ready for collection - and there will be an extra £75 charge for some extras they thought needed doing 
Now I know I am picky, but they didn't ask us to preauthorise anything, we didn't know anything was wrong with it and to top it all off they found a fault with something they fixed last year 
AIBU or should I have been asked about them doing this unauthorised work on my pride and joy?