Kenny cable - Nikon M-223 3-12x42mm Rifle Scope

When I received this scope, mounted and sighted in I was very pleased. However within 3 range trips the windage knob came loose. Not to worry it has a lifetime warranty right? I called Nikon and was told to send it in. They received the scope 12-29-14 but it was not checked in to their system till 1-12-15. This means it sat in their receiving department for two weeks with nothing being done. I have called several times to get an update and get the run around. I checked the status on my repair,on line and it said it was to be replaced. Here it is 1-22-15 no scope no idea when the replacement will be sent. It seems to me that no matter what their warranty is their product support/repair is terrible. I would not recommend their products or support. My son was about to order the same scope for his rifle but has decided not to purchase a Nikon scope.