Did you get your copy of Skyrim using a code from a reseller? They will frequently revoke stolen codes that get resold online.
Did you cheat, exploit, or do other anti-social things in ESO when you played? How long ago you played isn't immunity from consequences.
Just tossing out possibilities
Either way, this is not a Sony issue. Bethesda revoked your license. Blame them if you're going to blame anybody.