If it didn't give a message and it didn't give a timeframe then it was more then likely permanent. It was more then likely for the same reason as the last time you were banned (most likely insubstantial posts + paid sig) as I don't see any other reason for you to get banned based on your post history
AFAIK Ban evaders get permabans, so IF OP effectively evaded its 14 ban probably just became perbanned as soon as admin detected it.