Scope dead on arrival - Vortex Viper HS LR 4-16x50mm 30mm Tube Second Focal Plane Rifle Scope

Defective out of the box parallax adjustment knob frozen solid. Will only take around 3 weeks to get a replacement. Boxed it back up and am returning it for a refund. Optics planet expected me to call the manufacturer and ask them if the scope was defective. Really? Pathetic customer service and three weeks before a new scope would arrive.