September Statement says 0 credits earned and 0 credits pending...

Hello NR2DIE18,

From the FAQ:

What content can I earn a % back on purchases for?

Normally, most purchases for Xbox 360 and Xbox One from the Xbox Store qualify towards your MyVIP Star Rank and % back on purchases, including full Games on Demand titles (excluding game pre-orders), arcade games, indie games, game add-ons, game Season Passes,
movies, TV shows, TV seasons, themes and avatar items. In-game consumables, Xbox Live Gold memberships, subscriptions like EA Access and Xbox Game Pass, Groove Music Passes, Microsoft Movies & TV Season Passes, and the purchase or redemption of Microsoft Points
or Xbox Gift Cards, still do not qualify.

Since both those purchases were pre-orders, they were not eligible for MyVIP payback.

Lifetime credits earned is the total number of credits you have earned since joining the program. It includes credits that are pending as well as any that have already been deposited. If you're showing you have 0 pending credits, then they have already been
deposited into your account for use. You can view your statement on the MyRewards section of the site and it will list when any deposits took place. You can verify deposits by checking your returns at http://commerce.microsoft.com

On the MyRewards section of the Rewards site, Scroll down a little bit and you'll see "My Statement". Underneath that, it will most likely be showing you your pending credits. There's a link underneath the Pending Credits heading that says "View statement".
Change the option to Lifetime Credits Earned and you will see a complete history of all credits you've earned in the Rewards program as well as when any of them were deposited.

The deposit you see on the billing site, would be a deposit of around 7,000 credits.

Your lifetime credits earned is the total amount of credits you have earned since joining the program. It includes credits that are still pending as well as any that have already been deposited. If you check the MyRewards section of the site for your statement
it will list the amount of credits you have pending. If the amount of pending credits is smaller than your lifetime credits, then you've already had deposits. Your statement will list when any deposits took place and you can check for those deposits by looking
at your returns at http://commerce.microsoft.com

Hello ICE Danny ML,

The 9900 amount is your lifetime Credit amount. This includes previously deposited Credits. You can see a statement of all your Credit and deposit events on the MyStatement on the MyRewards page. For example, your last deposit of 6250 (81 MXN) on April 12th
was primarily spent on Titanfall 2 DLC. Your pending Credit amount (currently 0) is your un-deposited Credit amount.