Reactivation screen

[Dr_Maniac]

So after failing to root my G-900V (cid 11), I had to flash stock Samsung os for it to work. After flashing I was prompted to sign in with my Samsung account which I tried but didn't work. I contancted Samsung, reset my password and everything but now it says "processing failed". Is there a way I can get passed this reactivation thing ? If its not possible can I install a different os or something else? Please I'm desperate.