MiWay Insurance-Rejected claim and no customer service

We have lodged a claim regarding water damage to my vehicle after the heavy rains and after 2 weeks of Miway having the vehicle for it to be assessed they advised that the claim is rejected as its a mechanically related issue. After many attempts of trying to explain that its not a mechanical issue but electrical they rejected the claim. I also kept requesting the electrical assessment report & up until today no report. I then asked to speak to a manager on numerous occasions and was advised by the agent that the managers are very busy with people in and out of the building. IS THIS THE CUSTOMER SERVICE Miway provides and they take our premiums every month??? I lodged a complaint and still awaiting a person from the complaints department to return my call. EXTREMELY FRUSTRATED