How to change Apple ID

You can create a new Apple ID by following the steps in the support document linked below.

click ➜ How to create a new Apple ID - Apple Support

Outside of that, if your current Apple ID is locked or disabled click here ➜ If your Apple ID is locked, not active, or disabled - Apple Support

Do note, all purchases and app downloads will remain tied to the Apple ID that made them. Also, any active subscriptions may also remain active on the locked Apple ID.

Told by whom?

For what reason?

Change it in what way?

Please explain clearly what happened and what exactly you were told and someone may be able to advise.