Unlink Peacock

I’ve been trying to unlink my free peacock premium subscription, but it keeps giving me an error.  I want to deactivate this subscription because I want to get Peacock through a different service.  But when I try to do that, it cannot activate because Peacock is tied to Xfinity. I contacted Peacock and they said Xfinity needs to unlink it from my account. 

Can you please unlink it from my account, every time I have tried it says error (picture attached)