Change battle tag numbers

I want to change my battle tag numbers but I don’t know how. I tried looking it up but nothing I found actually showed how to do it. Everything I found just showed how to change the username not the numbers after the “#”. Is there a way to do it?

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Sadly, there is no way to change the numbers of your BattleTag. A Game Master from the Customer Support team also confirmed this. Those numbers are randomly generated, and even they are not able to change them.

Please help me with the problem. I want to change the phone number I have a new phone number