Got random amazon order sent to me and my mom

So there was a package sent to my moms house addressed to her and me, but her last name was her maiden and my last name was my old last name. In 2017 I changed my entire name so my new first name was on the package but my old last name was on there. It was 2 shirts that said Goals: Be happy and one that said Be nice. Asked some friends and my dad and no one sent it. I’m kinda freaked out about it cause is it my toxic ex? My old middle name was my moms maiden so maybe my ex would know that. Idk, even how to report it or what to do

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