I'm sorry about the issue. What's the model of your device, such as iPhone, iPad, etc.?
Does your device show something like this "This iPhone/iPad is currently linked to an Apple ID (firstname.lastname@example.org). Sign in with the Apple ID that was used to set up this iPhone/iPad."? If yes, what's the exact email address currently showing on your device?
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Do you also have a Windows or Mac computer?
Please type at the box below, then click on the Send button below to communicate with me, so I can help. Thank you,