Samsung's stupid, bugged, activation lock blocked my phone. What now?

[AC Question]

Here's the story: I moved to an S7, and recently I wanted to give my old S6 edge away, so I tried to factory reset it. When I entered the creditentials to my Samsung account, it would load for a couple seconds then show me the final factory reset button, as it should. If I clicked it, it would throw me back at the Samsung account log screen.
I thought the problem was with the Samsung account, so I tried to log off from the phone. The password WORKS, because it gets me to the profile settings screen. However, when I tried to hit remove account, it would act just like when trying to reset it; load for a few seconds and do nothing.
So I decided to delete the Samsung account from the PC. Did that, finally "remove account worked". Factory reset still didn't work, so I made a new account with the exact same ID and password, linked my phone to it, tried again. No dice. At this point I was getting mad, so I just used Smart Switch to reset it. Except now, it wants the Samsung account on the tutorial screen. And it still doesn't work, it loads for a few seconds and says "Processing failed". I know it's the right account because if I enter anything else it says "invalid ID and password", not "processing failed". I know it's the right account because I saw the E-mail before reseting the phone and logged into it from the accounts settings screen. I even tried all 3 of my E-mails and all the passwords I've ever used, just to be sure.
After swearing at Samsung for straight minutes, I decided to odin flash another firmware. It flashed ok, but it still asks for Samsung account. I already have Knox 1, so I tried flashing TWRP. It fails with "Custom recovery blocked by A/L" message on the phone.
Seriously Samsung? Since when have you become Apple level "secure"? I'm kind of running out of ideas at this point, any help would be much appreciated...

 

[Andrei S1]

It's the OP. I made another Samsung account with another email, it says processing failed just like when I enter the "real" one. So it might want another account, problem is I can't figure out why he doesn't take the one the phone was logged into before the reset.
Could it be asking for the account I deleted, and because, obviously, it's deleted, it can't log into it? What should I do in this case?
Also, I bought the phone over a year ago, and I think it was resealed since it came with knox 1 and was cheaper than normal. But I flashed it multiple times and even had TWRP on it for some time and it's the first time I run into this... Could it be asking for a Samsung account from before I bought it(maybe the first it's ever been logged into), even if I logged it into my Samsung account after this?

 

[Golfdriver97]

Could it be asking for a Samsung account from before I bought it

This may be the case.

 

[Andrei S1]

It seems that's not it. I got a message that a mail has been send to the corresponding e-mail after I started entering random stuff. Logged into my mailbox, and voila, a message from Samsung about how log-in has failed on my device multiple times. So it wants the account I'm entering, at least the e-mail. Since I deleted the account and created a new one with the same e-mail, I think this bugged it out. It matches the account name and password, but it's a different "instance" of that account, so it fails processing it. WTH am I supposed to do now?

 

[Andrei S1]

Solved: Turns out my Samsung account was broken beyond repair. I had to literally hack my own phone. I used an exploit and managed to get to log into my Samsung account from settings, but it bugged out again, not letting me find the phone on the website or even log out. So I had to format. start it again and use a new account, which let me remote disable reactivation lock. I won't detail the procedure because by using a new account I basically hacked the phone without using any credentials, and I don't want thieves to find out how I did it.
So yeah, be careful about deleting your Samsung account while there are phones linked to it and don't reset your phone if you see your Samsung account behaves strangely

 

[Golfdriver97]

Sorry about the delay in getting back to you. Glad you figured out a solution.