As of my last knowledge update in January 2022, Facebook doesn't offer a direct customer service phone number that users can call.1-855-974-1385 However, they provide various ways to seek help and support through their Help Center and online resources. Please note that the information might have changed, so it's essential to check the most recent details on the official Facebook website.

Instant Messenger: https://groups.google.com/g/microsoft.public.sharepoint.windowsservices/c/DyIfIfPng6w