CableCARD reactivation

I inadvertantly 'removed' one of my CableCARDs from my account during the process of upgrading our internet plan. I have one that is working fine, and one that says 'validation needed'. I just spent 2 hours in a chat session, and she was trying hard, but was unable to reactivate it. It was working fine up until the day I removed it from the account. I don't need a new one. I don't want a different box. I just need to reactivate one of my CableCARDs. Can any employee get me in touch with the CableCARD department? They were fantastic a couple years ago when I initially got the cards and activated them. Thanks.