You can contact Coinbase™ customer service 1-820-(587)-9074 o through several methods. The fastest way is by calling 1-800-Coinbase (1-820-(587)-9074 o ). You can also use the chat feature on the Coinbase app or website. For social media support, message them on Twitter or Facebook. If you prefer email, submit a form through their official website. Additionally, you can visit their ticket counters or service desks at the airport for in-person assistance.