"Account isn't eligble for this peacock offer" Error Message

I am a Xfinity Platinum Rewards Member. Whenever I try to activate my "Get Peacock Premium at No Extra Cost", I click the link, and it then takes me to a page where it says "We're sorry, your account isn't eligible for this Peacock offer". I am eligible for the offer though because I have Xfinity Platinum Rewards. 

I've tried calling customer support and doing text support; however, neither of the agents through those methods were able to figure it out through basic troubleshooting.

Any help would be much appreciated!