Mechanical Warranty Unfairly Rejected

My warranty claim was rejected due negligence which is not true,

As my responsibility to avoid any further loss the moment I saw the oil sign on my car I took it to the nearest ford dealer for check ups. There are no incorrect lubricants or fuels of any kind that I've used and there's no improper servicing or malicious damage of any kind whatsoever, my car has a full service history from the Ford dealership alone. So I really don't understand why my claim was rejected because all those reasons aren't true and my service history is there in my book. They say that I shouldn't have driven my car the moment I saw the light but they never send me their policy wording explaining this until now.

We pay our premiums every month and this is the service we get I'm really disappointed