01-20-2017 02:45 AM
01-20-2017 03:40 AM
Extra storage is offered when reaching Level 4 not Level 5 and has to be redeemed within 30 days. As you're a L5 now that suggests you reached L4 some time ago, probably more than 30 days ago in which case your offer has expired and can't be reinstated
Btw since July 2016 the offer was 100GB not 1 TB