There is no way to renew at the same discount that you signed up with. You can, however, extend or reactivate your membership by purchasing a new subscription through the website.
If you have a current promo code, you can enter it during checkout for a discount on your order. Please note, any subscription you purchase will be set to renew automatically at the full price regardless of the discount you used during checkout.
The new subscription will not begin until your current subscription has ended. You will see a new renewal date reflected from your account page. If you cancel the auto renewal from your account page it will expire at the end of the term.
If you have any questions please contact Customer Service.