Trial period distance

 The trial distance is very short.  Is it possible to have 2 week time period rather than 50km? 

I can not figure out how to enable my 2 week trial period. I just purchased a Tacx Bushido trainer because they had that offer and I can not figure out how to start the trial.

I believe there is a card with a code on it packed within the trainer.

If you have the code and need to enter it, try here: https://my.zwift.com/billing/promotions

Also to get you started check this out: http://titaniumgeek.com/zwift-user-manual-unofficial-running-updates/