Being that everything on file already can I wait a few months then go back and tell them my aunt change her number and give them someone else number that’s willing to help ?

Nope!!!! They will definitely investigate You, several times.. And if they find out that you are deciving them, you might be marked as a fraudulent case. And be Denied permanently.. Be Honest... Good Luck

No because they will go to her house. You need them to say that you can't stay with them anymore. Sorry.