Ohh, this is not good. Is there some 2FA involved?
I mean, I used to do some whole account buys on GAW, in time, where email change was not also possible in a way, that seller disabled 2FA, we used escrow, which gave me his login details after payment and I logged in and enabled 2FA on my phone.
This way, seller lost his access to account forever. He would request new password (had to be jerk for that), but it would render account inaccessible for both sides...because of 2FA set for me only...