The right as a customer

I had a breakdown on the 25th of April 2016 just after filling my car with fuel at a nearby filling station, a few second later my car broke down, I called budget insurance to assist me with the towing which they did , the car was towed to Ford Centurion. a few days later it was discovered by Ford that the car was filled with Petrol and water, which is the reason why my car broke down .i called Budget insurance and told them about my situation and that I was taking legal action against the garage and that I needed invoices and proof of the towing in order to provide to my attorneys, its been two weeks and I still don't know what the hell is happening which is delaying this matter further. I have a right as a customer to get the invoice as per what my contract says, I just don't understand why I'm not been assisted, I been calling almost everyday and no one seems to care enough to help. its think maybe its time I change insurance its not the first time I get this kind of attitude from Budget. my id number is ***, my contact details is ***