A:AnswerIt's not that Nintendo doesn't want the money. It's that they're probably trying to calculate the new price they'll need to sell it at to offset the new tariffs Trump set. And it's most likely going to be much more expensive and they're probably trying to determine what price they think people will be willing to pay.
A:AnswerEvery time you make a payment call the Card Company and tell them that you want the full payment applied to the oldest promo first.
(And be sure your payments are enough to pay off the entire portion in 12 months. If you don't pay it all off in 12 months, interest will accrue from the date of purchase, not only on what you still owe after that year is up.)