Not getting Heirs to Westmarch frame after linking battle.net account

Hi, my diablo immortal account is already linked to my battle.net account, but I didn’t get the Heirs to Westmarch frame.

And I cannot unlink and relink my diablo immortal account to my battle.net account anymore.

Is there still any way else that I can do to get the Heirs to Westmarch frame?

Thank you.

Device Type: PC
Device Operating System: Windows 10