How do I contact Facebook Customer Service if I have a problem? To report what's not working: then contact Facebook customer service. Firstly, you should log into Facebook on your computer. Tap on the upper right corner of Facebook. Select Help and Support, then select Report a Problem and follow the instructions on the screen. However, you need to visit or website for more detailed information related to Facebook. https://www.techjaadu.com/facebook-phone-number/