Hello @Anaswara555 welcome to the Local Guides Connect community!
Did you check, whether the listing was claimed by the owner(s)? If so, I believe it has priority if they changed the number by them self. If you don’t see a button saying something similar as “Register as owner”, the owner already did claim it.
This is an example of a listing which was not claimed yet (in German language):
Regarding:
You can find many tips here on Connect, but nothing can ensure such edits are accepted. As a starting point, I suggest @MortenCopenhagen’s How to Get In and Out of Trouble: The Main post , although it is mainly focused on reviews and photos not being accepted.
I also suggest to share the link of the place listing, when asking for help here:
P.S. I just noticed, I overlooked this sentence:
Is the correct phone number published anywhere? I believe, Google verifies, whether there other references on Internet.