Recovering account/plan that's been cancelled for exactly 60 days

So I had a line under my account that apparently was cancelled exactly 60 days ago (since I had a pending balance) I completely took care of the balance but was not aware the line had been cancelled (was outside the country for a few weeks and this line was just used as backup) 

Now this was a grandfathered internet wireless plan that's no longer available, every time I call CS I am told the number is no longer available (apparently the plan had a wireless number assigned) I obviously don't care about the phone number attached to the plan since it's of no use, but I would obviously like to see if this plan can be recovered for my account, I have been a customer of at&t for almost 20 years now and it would be a bit sad to stop being a customer because of this