Missing funds

You would need to contact the developer turn 10 and speak with there customer service.

I think you need to go back to Forza / turn 10 support.

It's ingame currency and thus game related..

Probably no one at Microsoft can sort this out for you.

Then you'll need to contact support and speak to billing to see if they can find it. http://support.xbox.com/contact-us

If you still have the code, try redeeming it again. If it says it's been used, you'll need to try contacting support to see if they can track the original transaction to your account. 1-800-4my-xbox if you're in the US/Canada or
support.xbox.com/contact-us

Hi, I hope you're doing great out there. I am an Independent advisor and I am here to help you in regard to your concern.

We need to validate if it was redeemed under the correct account. Please sign in to https://account.microsoft.com/billing/orders, once confirmed check your payment methods as well, please go to https://account.microsoft.com/billing/payments.

Once you were able to confirm and you’re trying to buy the game from your console please make sure that you’re signed in under the correct account.

“REMOVE ACCOUNT​​​

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1. Press the Xbox button to open the guide. ​​​

2. Select System > Settings > Account > Remove accounts. ​​​

3. Select the account that you want to remove, and then select Remove to confirm. ​​​

4. When you're finished, select Close. ​​​

​​​

POWERCYCLE CONSOLE​​​

​​​

1. Turn off your console by holding the Xbox button on the front of the console for approximately 10 seconds. The console will turn off. ​​​

2. Turn your console back on by pressing the Xbox button on the console or the Xbox button on your controller. ​​​

​​​

ADD ACCOUNT​​​

​​​

1. Press the Xbox button to open the guide. ​​​

2. Select your gamerpic in the upper-left corner of the screen, move all the way down and select Add new. ​​​

3. Enter the Email address and the password.​​​

4. Read the Microsoft Service Agreement and Privacy Statement, and then select I Accept. ​​​

5. Follow the steps to configure your Sign-In & Security preferences to add your Microsoft account to your Xbox console.​​​“