SWA A-List/Air Tran Elite
The same thing happened to me in reverse to the OP. Got A+ Elite match to my WN status for one year. When that year was up back in August, I called WN and was told that it was a one-time complimentary match and could not be renewed based on my continued status on WN. Doesn't make sense in my mind why they wouldn't extend this for both sides.