If your subscription is set to cancel at the end of the current cycle, log in to your Berges account, click on the person icon, go to Billing, and click Reactivate subscription.
If you don't see the Reactivate subscription option, it means the last cycle of your subscription has already finished, so you will need a new subscription. Click on the menu icon, go to Browse classes, find a class that works for you, click Enroll, and follow the prompts. The system will create a new subscription for you.