I'll send you an email with how to renew. Normally, the renewal discount is applied automatically when the subscription automatically renews. You look to have cancelled the automatic renewal back in November, so it expired normally.
I'll let you know how to renew with the discount as it's only been expired for a short period. In the future, I'd recommend leaving your automatic renewal enabled so that you'll get the discount going forward. If a subscription lapses for too long the only way to renew is at full price.
Thanks,
Alex