Recently started playing again, re-bought everything now my free month is up. How should I go about renewing?

I played from when AQ went live in vanilla wayyy back in the day till BC, in which I got as far as the final boss in TK. I got a new account a little while ago and re-bought everything (since I never had WotlK and Cata) and my free month just ended. I'm re-leveling a priest and all I can say is the low level quests were AMAZING and actually really fun compared to when I would just literally grind to 60.

Now that my free month is up, is there some hidden (to me at least) way of renewing that could help me out? I'm jealous of all the bind on account gear with exp buffs and the refer a friend perks. I just want to get to 70 so I can actually experience new content to me (minus the numerous class changes ((which are all so different but awesome))).

I'm about to run an errand and then sign up for another month on my debit card if there isn't a better way of doing this (which there probably isn't, but I figured I would try and ask the amazing community here).

PS: Nobody cares about Murlocs anymore???