Loss of Microsoft points without buying anything

I had got 500 Microsoft points and I haven't spent any of them, I am an Xbox live ambassador and got an email saying hat 200 Microsoft points had been deposited in my account, when I checked if I had 700 Microsoft points like I should do I discovered I only had 200 and had lost 500 that werein my account, What should I do?
 

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Last updated July 5, 2018 Views 0 Applies to:

Check your account at https://billing.microsoft.com  It will show you all of your points transactions. If you notice anything suspicious, you will need to call support.

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It says my points expired

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Some points earnt through promotions,etc. do expire after a while.

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