Car sound/Amp

On the 25 September I contacted MiWay to log a claim for my car Amplifier that burned down, I was told to get a technician who will check and diagnose the Amplifier for me, I went to see a technician and I was charged for the Amp to be diagnosed. Was told by MiWay representative to do so and they even sent me an sms and email to confirm what is needed, suddenly today I received a phone call and they told me that they don’t cover electrical faults, I fault that I described to them, why couldn’t they tell me from the time I logged the claim as they should have known what the do cover and don’t cover. Worst experience I’ve ever experience and I’m currently looking for other insurance products as it obviously shows that I can’t trust MiWay with my money