Adding time to account?

Not sure if this is the correct section to post this...So with the game I get a free thirty days and I currently still have 20 days left. I want to add another 90 day subscription, I put in my card info and stuff but it won't charge me. It just says that a subscription isn't required at this time but that it will charge at the end of this current subscription... problem is I really don't want it to charge me in 20 days I need it to take the money out of my account now otherwise it's very likely I'll forget that money is reserved and it won't be there in twenty days. Lol. Is there a way to get it to just add on the 90 days to my account.

Plus I wanted to get the bonus items for using a recruitment code and the bonus items for the 90 days but it won't give them to me until it charges my account and I kind of want to use that friendship circlet before I hit level 25...otherwise it's a pointless item as I'll definitely be level 25 well before 20 days is up.

Any answers for this?

As you found out the subscription won't charge you until it needs to, it's not possible to force it otherwise.

You can however buy a time card (online at various shops or in a physical store possibly) and apply that. Time cards take immediate effect (since you already paid) and will count towards your veteran rewards. Unfortunately (at least in my region?) they're slightly more expensive than the regular subscription price.

A third option might be to buy Crysta (SE's virtual currency) with your card (so you're paying now) and it's then sat in your account waiting and you can setup the subscription to use the Crysta when it comes to renew. It won't give you veteran rewards early and I believe the price is still marginally more expensive than the normal subscription (I could be wrong), but it's something to consider.