Be sure to redeem the appropriate voucher code (subscription or one-time) for your order. A voucher will be considered invalid when applying the code onto the incorrect type of order. One-time vouchers will need to be applied to all one-time items in your cart. Subscription vouchers will need to be applied to all subscribed items in your cart.
If you redeemed the incorrect voucher code, contact us by submitting a form here so we can help out.