The Valdada US support is currently moving its facility from Steamboat Springs to the Littleton, CO area. Due to that, at times, there is a bit of a lag in phone service. The company is trying to do so in small legs to minimize disruptions as opposed to shutting the company down for several weeks.
In any event, the warranty info and instructions for dealing with a defective product are at:
http://www.valdada.com/order:info?token=4WQXMvIbPlLTWerc6vdIUQ
Excerpt is as follows:
Product Guarantee
All IOR optics and mounts carry a lifetime warranty against defects in materials and workmanship. However, any tampering with or disassembly of these products will void the warranty. In the unlikely event that your IOR product requires repair or replacement, package it carefully and ship it to one of the following addresses, depending on your choice of carrier:
For shipment by U.S. Mail:
IOR Service Center
c/o Valdada Enterprises LLC.
PO Box 773122
Steamboat Springs, CO 80477
For shipment by UPS:
IOR Service Center
c/o Valdada Enterprises LLC.
31733 CR #35
Steamboat Springs, CO 80477
Be sure to include some legible form of paperwork with your name, address and a brief description of the defect. The unit will be repaired or replaced at the discretion of Valdada Enterprises.
Valdada policy is for all returns on a defective item to go through the central facility for tracking and repair purposes.