did the activating of the key actually worked ie you
1. Enter your retail key
2. Enter a subscription options
3. Enter a valid credit card or game card or paypal. and the payment method was verified.
then your key is activated you will have the 30 days bonus subscription and will not be charged for your subscription until the 30 days are used up. If you cancel before the 30 days are up you will not be charged at all and your game account will be inactive after the 30 days.
you account should show retail game in the featured prodect section and you will have dispalyed a subscription section with a play until time 30 days from when it activated.
if you did do the above but did not show active as stated above then you neeed to contact billing.