How do i contact diamond now customer service? Questions about your Diamond ® NOW™ project? Contact our Customer Service at 1-844-614-0002.How do i contact diamond resorts by phone? Resort Phone: 1.757.220.1200 Reservations Phone: 1.800.438.2929 Email: [email protected] For information on other Diamond Resorts properties visit www.diamondresortsandhotels.com Learn more about Group Reservations.What is the address for diamond foods? Diamond Address: Diamond Foods, LLC. Attn Consumer Affairs. 1050 S. Diamond St. Stockton, CA 95205. How do i find my delta diamond phone number? I was able to get the Diamond number from Delta - I don't see a reason for the number to be secret, and publishing it can only help other Diamond members - the phone number is 1-877-220-6888. This phone number is on the back of your DM card. It's been on the back of the card for the 13 years I've flown with Delta.