I'm convinced that it is impossible to find the customer service number for amazon.com.

 So in case anyone ever needs it:

Phone: (800) 201-7575 and / or : (206) 266 - 1000
Fax: (206) 266-2950 and / or (206) 622 2405

Address: 1200 12th Avenue South Ste 1200

             Seattle, WA 98144-2734