im having the same problem, we also cant get in contact with activison cuz we cant log into the account when trying to contact them
Good afternoon, in order to unlink your ps4 from your activision account, go to this link and sign into your ps4 account https://s.activision.com/activision/profile?lang=en_US
from there it should give you the option to unlink your account once you sign in. I hope this helps!
I'm having the same issue with unlinking anything from Activision.
I have my old xbox-gamertag linked to my current Activision account.
My current xbox-gamertag is linked to my old Activision account.
When I click UNLINK on any account under Linked Accounts for either activision login, it says "unlinking is unavailable for this platform. Contact Activision support."
I really need this to be able to play with my friends.