I had an old PSN account linked to my profile and I made a new one because I really didn't like the name and I was switching to PS4 so I felt like it would be the best time to start fresh. The only problem is, whenever I try to unlink my old PSN account from my profile and link a new one it automatically relinks the old account, giving me no option to change the account over to the new one. I could make a new profile on Bnet for my new account, but I'd rather not because of the amount of time I've had this one and I like to keep things together.
Here's what you need to do. 1) log into your b.net account with the old PSN credentials 2) create a Microsoft/gmail/Facebook account 3) link the account to your b.net profile 4) log out 5) clear your browser cache 6) log in using the credentials for the Microsoft/gmail/Facebook account you just linked 7) unlink your old PSN 8) link the new PSN