Luminescence

I just purchased it and everything worked fine, but I do have one question.

I don't think I'll be able to continue paying monthly, so will I have to cancel my subscription to avoid future charges, or does it automatically lapse and cancel itself?

[Yes, I know not to use any actual VIP-only things, unless I purchase them, etc. etc.]

Thanks in advance.

EDIT: Also, I seem to have two City of Heroes accounts on my Master Account. Is there a way to delete one of them?