Pay Invoice GAA appreciates your timely payment for services rendered. Please mail checks made out to Granby Ambulance Association Granby Ambulance Association 1 Pegville Rd. Granby, CT 06035 COMING SOON! For billing inquiries, contact Certified Ambulance Group online or by calling 1.800.336.6402. To obtain copies of your medical records, contact Liz Hayes at email@example.com.