Hi @Diana2435
It's really worth you familiarising yourself with how Airbnb works through the Airbnb Help website which has FAQs on all the basics of managing your STR business on Airbnb.
When you read up on Airbnb reviews you will see they are left blind so the guest won't know what you have said until both reviews are published. Just leave an honest review. Why would you contact a guest to warn them?
Why did your guests knock on your neighbours doors. What did they say when you raised this issue with them at the time.
Please ask guests vetting questions as part of your vetting process to ensure they are a good fit for your listing.