Unable to connect devices - pc to ipad using key premium
I am using windows 8 and I upgraded a while ago to key premium on my PC, which it is saying it is. When I try to connect devices my PC just states if you have KEY PREMIUM generate a code on another device and enter it here. On my ipad it states the same thing. My ipad shows in yellow key free subscribe now but when I go into subscriptions it just gives me payment options. If I go into help and enter voucher and enter the premium voucher code it states validation failed - could not validate the voucher. This code has already been used or has expired. I have tried uninstalling the app and adding again but still have the same problem so I feel like I am going round in circles. I am using iOS 8.4.1 software on my ipad.