Xbox live achievements have been taken of my account

Yea this used to happen a lot back in the good old days. You would get on and all of a sudden your sitting at 0 gamerscore.

Hi there,

Have you tried logging into your account via xbox.com and checking to see if the achievements you have previously earned are still shown there?

To view your achievements online:

1. Sign in at xbox.com.
   
2. Select your profile icon in the upper-right corner, and then select Profile.
   
3. Tap or select Achievements.
4. Select the title of the achievement you're trying to unlock.
5. If the achievement appears under Achievements, it's already unlocked.

If you see the achievements they are still unlocked and credited to your profile. They should eventually sync up to your Gamerscore on the console again. In the meantime, as stated in a prior reply, you can also try to remove and add your account profile
back to your xbox one to resync your achievments. An easy step by step guide on how to remove and add your account back to your xbox one is linked below.

https://support.xbox.com/en-US/my-account/manage-gamertag-and-profile/add-remove-account-xbox-one

It's a rare glitch, should sort out on it's own in a day or two.

Never heard of anyone having this issue before, if after 3 to 4 days your gamerscore isnt back to normal i advise you to contact xbox support

It happens from time to time.Not as common as it used to be but it still does happen.

I had it a couple of years ago,over 200,000 Gamerscore just disappeared & then came back a couple of days later.

Never heard of anyone having this issue before, if after 3 to 4 days your gamerscore isnt back to normal i advise you to contact xbox support