the person you gameshared with likely changed it
if you call SONY support and can prove your the owner of account by knowing the D.O.B and the security answer to the question
E-mail support was removed a long time ago.
Your only option other than telephone is Live Chat.
Click on "Contacting Support" in the lower left of any forum page.
** Engage brain before putting mouth in gear ** ** two-step verification - use it **
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