I've had loads of hassle off my current insurer (swiftcover) because they want me to use their recommended repairer for repairs to my car.
Basically, the nearest recommended repairer was 40+ miles away (in fact, in a different country!!!) so I told them to get stuffed and found a local one.
Since then they've tried all sorts to get me to change my mind. They've been deliberately obstructive in my opinion.
What exactly is the law with regards to repairers etc? I'm wondering if its worth complaining about their behaviour....