Question

[Dr. Zeppers]

Yes, they charge you, set your next renewal or expiration date depending on payment method.

Creditcard - renewal date (they attempt to charge card for next month automatically).
Gamecard - expiration date, enter more cards to extend date.

Creditcard renewal transaction fails, your account goes basic.
Gamecard time expires, account immediately goes basic.

Only way to cancel for sure, is to call them.

You call them and just cancel renewal, they set expiration date for paid time, it will go basic when expires.
You call them and cancel, and ask for any refund, you will go basic immediately.

But I think your gonna have to call them.