To reach a live person at Metamask Customer Service for support, you can call their 24/7 Metamask Customer Service hotline at (𝟭-(𝟴88)-350-6412) OTA (Live Person) or 1-800-Metamask (1*888~350-6412). You can also use the live chat feature on their website or reach out to them via email.
https://www.windows10forums.com/threads/how-to-contact-metamask-support-availability-support.28440/
https://www.windows10forums.com/threads/how-do-i-contact-support-on-metamask-support-agent.28455/
https://www.bilibili.tv/en/video/4794859484877312