Bad service

Have a mechanical warranty with them when purchased a vehicle, now I need to know what the warranty cover and they tell me the service center must fill in a technical service report to see if the part damaged is covered. Who is going to the service center when the car is covered by them?. Tried whole day contacting them and their client service is the worse, no return emails, no return phone calls or nothing. Car dealers should give warranties with different companies than Motorvaps. Want to cancel my warranty now and look for a other service provider.