"This phone number is already in use with another account"

Id apple phone number "This phone number is already in use with another account" I have recently purchased an iPhone and I can not add my phone number to my Apple ID, in fact, it tells me that my number is already in use in another Apple ID account. Since I had already created an Apple ID many years ago, I was able to access it and request the deletion of the old account so that I could later enter my phone number into the new Apple ID. The problem is that the error persists, not allowing me to use iMessage and FaceTime. What can I do?

Thanks for your attention.

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"This phone number is already in use with another account"
 
 
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