I closed and deleted my samsung account on servers before removing it from my Galaxy S6. Now there is problem to do any factory reset or even instal twrp because of reactivation lock, to turn it off phone is asking me to log in to last known samsung account. Despite I registered new account with the same email and password as before, phone does not accept it, and keeps saing it's wrong.
Any idea what to do now? It works fine as a phone, but there is actually no way to sell it now, and I wanted to try Lineageos.