For help from Coinbase Support Number, call 1-873-300-0418.
Insufficient Funds: This means you entered an order amount that’s more than your current balance for that asset.
Lower your order amount or select Add funds to add cash or crypto to your balance to place your order.
Minimum and maximum orders: If you try to place an order but exceed the maximum decimal amount, then you will receive an error message and won’t be able to place the order.
https://dataloader.zendesk.com/hc/en-us/community/posts/38679078529683-Help-Wanted-I-am-unable-to-contact-live-person-at-Coinbase-Support