Chevrolet India — Beat diesel car

Address:

Palakkad, Kerala, 678001

Smoke coming from my beat diesel car, got extended warranty expiring on 7th june 2017. Mail from warranty desk: "claim cannot be entertained, because the mentioned vehicle not done the service as per gmi schedule. Gap between 2 service was more than 12000kms. Kindly ask the customer to carry out the work as paid."
Is there any possibility for getting the work done thru extended warranty.
All the services are done from authorised service centers of general motors
Please help.