Cannot connect xbox live gamertag with origin account

You need to contact EA game advisor DIRECTLY to get it check then,only they have the tools and authority to go into your account to check what went wrong .

AHQ a Public forum ,since it would involve accessing your account to verify which we cannot do in AHQ(the policy of the forum forbide personal information to be post in here .for eg,email,password,contact No,..) .In order to solve your problem you will need to speak with at game advisor at EA Customer support:  https://help.ea.com/contact-us 

For any issues regarding accounts, please follow these steps to contact a game advisor for more help:

1. Click the link https://help.ea.com/en/contact-us/ask and log in with your Origin name and password.

2. Where it says: ’What Can We Help you With’, type in ‘GAME NAME’

3. Click Find Solutions

4. Select "Your problem,eg accounts" from the drop-down list and also select your platform from the list.

5. Click: Find Solutions

6. Scroll down a little and on the lower right hand side, Click "I Still need Help"

Picture to help you understand better,  https://help.ea.com/article/welcome-to-the-new-and-improved-ea-help-center

If live chat is gray, change your country to US and make sure you're on US Business hours. It might also gray because they're very busy. Try later.

The Window Will Open...
You’ll now see the currently available contact options(Depending on your game). These may vary depending on your geographical location and the time of day. Phone or Live Chat are the best options.

For customers in North America:

• Select "Call me."
• Enter your phone number.
• Select "Submit."

For Customers outside of North America:

• Go to the "choose a contact method" section
• Contact us using the telephone number provided within the listed opening hours

Please be aware that it is likely that the agent you speak to will need to confirm your personal informations on this account.

Hope this helps
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***Please note...I do not work for EA/Origin. Questions belong in the forums,Solution is like medicine,same medicine/solution may not work on same problem.I'm helping you because I'm also a victim of EA for releasing their half baked products to us,gamers.

I don't answer questions via PM.  AHQ is "Player-to-Player" technical self-help forum