Missing reward credits that were "deposited"

Have you checked your returns at http://commerce.microsoft.com ?

Hello Dredd Duval,

You can see a complete history of your Credit and deposit events from the MyStatement on the MyRewards page. You can then use the dates listed for your deposits to see their deposit as currency from your commerce page at (https://commerce.microsoft.com/),
where they will be listed as a refund with a negative amount. For example, that deposit was spent on a September 5th purchase of Forza 5.

$1.15 would be a deposit of 1,015 credits. If that's how many it shows were deposited on the Rewards site, then the deposit was correct.

Microsoft points were discontinued in 2013 and changed to Rewards credits.. If you signed up for the Rewards program after points were discontinued, then you would not have earned any points.

Credits are deposited by the following 15th or 30th of the month after you have at least 5,000 credits pending, or you can request a deposit when you have at least 1,000 credits pending but less than 5,000, and they would be deposited on the date listed
on the site at the time that you request the deposit.

Double check your transactions after that date to see if the credits were already used. Rewards deposits are listed as a refund so it is showing your credits were deposited. Once your credits are deposited, the Rewards program is no longer able to do anything
with the credits. If you're still not seeing anything that could have used the currency, or still having issues using the currency, you would need to contact Xbox support and speak to billing again.