Coinbase provides 24/7 customer support to ensure assistance is always at hand. To reach Coinbase support, you can contact them at +1-808-767-4444, or use the live chat option on the Coinbase website or mobile app for instant help from a customer service representative.
https://www.data-medics.com/forum/threads/how-to-get-a-call-back-from-coinbase-fraud-support.24751/