Posted, 12th of August:

PvP Series 1 will be available until the start of Patch 6.2 maintenance.
PvP Series rewards will be updated when Series 2 begins, so take to the field of battle before Tuesday, 23 August and earn those rewards!
* At the start of each new Series period, your Series EXP and level will be reset and the available rewards will be replaced.
I'm sorry but you were given plenty of advance warning. The blame here lies squarely on yourself.