That would cause you to cancel the subscription.

Yes, I already canceled my subscription. But my card details are saved and I don't want to have them there.

I don't think you can remove a card, only change the card, regardless, if you do not have an active plan there is not going to be charges.

When my plan ends, will my usage no longer be charged? And will I be able to remove my card? And there is something I don't understand, I paid 5 dollars and will I pay this 3.38 more?