If you purchased your lifetime subscrip in the past 24 hours, you'll either have to wait 24 hours to see the Borg race, or submit a support ticket and wait until they can address the issue for you.
I have had Lifetime for about 5 days now >.>
* Star Trek online - Fileplanet Closed Beta access
* Star Trek Online Del Taco Promotion A
* Wrath of Khan Admiral's Uniform
* Star Trek Online - Preorder
* Star Trek Online Lifetime Subscription
* Star Trek Online Del Taco Promotion C