trying to modify the audio and it is using up my credits, but not changing the audio at all.

First Prompt: A beautiful mom, dressed in a cozy sweatshirt, walks down a lit-up street with her two kids for trick or treating. add sound of children laughter and "trick or treat" in the background.

Then went to edit video because the Mom’s voice becomes all creepy as she sounds like the daughter.

Second Prompt: remove the little girl's voice saying "Let's go to that house next." replace it with the mom's voice say "Let's go to that house next!" This change matches the voice with the person speaking.

No change. Created exact same video.

Third Prompt: The voices don't match the person speaking. Please fix this so the voices match the person speaking.

No change. Created exact same video.

Fourth Prompt: remove the voices. add Halloween festive background music.

No change. Created exact same video.

Each prompt charged me 500 - 800 credits for no changes.