ACN: Dissipated

What exactly do you mean by your games disappeared/are missing? Did you uninstall some games to make some extra space so that you could download your new game? If that's the case, all games you own digitally would be found in the "ready to install" section
under your "games & apps." If you had them on disc, you'll have to reinstall the game off the disc again.

The Model Name is ACN and the Model # is AZ1000

i acn not go live with my xbow

You will need to contact support directly about any purchasing issues. https://support.xbox.com/en-US/contact-us

Le système est configuré pour demander un autre moyen de paiement si vous essayez de payer avec la devise Xbox et que vous n’avez pas assez pour couvrir les coûts. Cependant, pour le moment, il est impossible de sélectionner différentes façons de payer en
utilisant des cartes de crédit ou des cartes-cadeaux.

Translation:

The system is set up to ask for an alternate payment method if you are attempting to pay with Xbox currency and don't have enough to cover the cost. However, at the moment there is no way to select different ways to pay using credit or gift cards.