Soo when ppls started selling unmderged wow accounts last year i bought one and played on it and i made alot of achievs mounts and pets and soon before mop it got locked because they said i need to send them an copy of ID with the name of the wow account owner (which obviously i didn't had) soo i lost that account. but now i found a way to get those achieves and etc to a new wow license on the same battle.net.
This might work only with unmerged account and il explain why and how it works.
First i went to live chat support on battle.net and asked a gm to unlock my account and ofc they asked for an ID. i told them that i have no scanner or a cam to make a copy/photo of my id and that it might take few days, soo they put my live support ticket on hold.
After that i added an wow license to that bnet acc and opened a ticket that i want my mounts and stuff on my new account from my locked account. and the gm gave me those things but only because my other ticket was on hold untill i get my ID copy.
I thought this might help ppls in my situation. and it's verry important that you first talk to a gm on LIVE CHAT soo they ask for an ID and make the gm to put your ticket or case on hold. and this will work only in this situation because if the banned account is perma banned they will tell you that the license for that wow acc is terminated and they can't help.
GL.