Hey @Jack256 !
What @Cawtau said is indeed correct, sorry about that.
With the new Payment Program, you would be able to make payments towards your device balance, which would reduce your monthly payments, but not the amount of months left to the financing period.
As @FidoDaniela mentioned though, if you want to pay it off in one big payment, you also have the option to cancel the financing and the balance would be applied to your next bill.
Welcome to the community!
~taken from link above.
Is that information not correct?
If the information listed is correct, you would need to contact customer service to make the payment. Alternatively, you might consider sending @FidoSolutions a PM. Once they verify some information, they'll also be able to access your account.
Hope this helps 😀