The subscription discount is a one time offer that depends upon its original rate and any discounts offered at the time your subscription began. Since you accidentally upgraded it to annual billing, the rate now is based on your new version. To fix this, I recommend contacting our Support Team to check for options available to bring back the discounted price.
Click the Help button, then choose Contact Us.
Enter the concern in the description field like subscription discount, then hit Let's Talk.
Choose either Start messaging or Get a callback.
Complete the needed information, then tap Confirm my call or Send a message.