I try to login on the app, and it says account not found, WHAT IS HAPPENING?
Based off the limited details provided, it sounds simply like the incorrect Facebook or GooglePlus account has been entered at the Live Log In. Locate and log in with the correct account.
Or it could be that the subscription purchase did not complete, or previous sub has expired. Hard to know. If you can provide more specific details including device make and model, rooted or Jailbroken etc. that will help. :)