2 accounts need help

for some reason i have 2 account in one i dont have any progres in game while the other is the same as i left it but now when i try to log in to my account i get the profile with no progres and i cannot get my old profile back i tier to conect activison and battle.net but nothing all the same while my friend has bout of my account in his friend list and it shows one with progres and the other brand new what is going on. i need help