Night Hawk XR500 Factory Reset Not Working

Model V:unknown
Firmware:unknown

OS: Windows 8.1

Browser: Google Chrome

Recently purchased the router from eBay and instantly ran into trouble. When I started the router, it asked for user and password. I was told it had been reset so I put in the default. admin for user and "password" for password. After three attempts it told me I did not have the authorization and prompted me the password reset feature. Since I did not set a previous password and did not know the sequrity questions I self reset. I held the button for seven seconds and attempted again. I again ran into the same issue where default settings were not being accepted. I even attempted a "hard reset" going for the 30-30-30 reset and still the same problem occured. I have searched the forums here and have found similiar issues on other routers. I have reset multiple times using the simple 10 second hold to the 30-30-30 and none have worked and have constantly sent me back to the same screen. I am at a loss of what to do and I am regretting ever buying this router. Please help.