Unable to active/subscribe Peacock premium

Hi, I'm a Xfinity platinum member. I have claimed the Peacock premium plan offer from the membership benefit page but unable to follow the next step to active the Peacock. 

When I click, the Peacock active link, it showed "We 're sorry, your account isn't eligible for this Peacock offer".

But from the membership page, I can see that the "Peacock premium" offer was redeemed and active.

I also try to see if it's in my subscription page. But there is nothing (Didn't see stream store/ subscription hub as well). And the page of add/manage subscription shows "sorry, please contact us"

I have talked with online agent for hours and tried different steps. I also  tried  cleaning cookies, using private window and different browsers.  None of them work. 

Please help!