Web site: Diamondcard.us

Email: support AT diamondcard.us

More contact information

For more information contact us at one of the following numbers:

 +1-877-402-VOIP (+1-877-402-8647) - USA toll free
 +1-303-997-0900 - Colorado, USA
 +1-647-722-2117 - Toronto, Canada
 +33-176-641-289 - Paris, France
 +44-207-100-5767 - London, United Kingdom