If you have an issue with the Coinbase integration in the BitPay app, there are two ways to get support.
Issues with App Functionality
If you find a bug in the BitPay or Copay wallet software which is affecting the functionality of the Coinbase account integration, please let us know!
Issues with Coinbase Accounts and Purchases/Sales
If you have a question or issue related to a Coinbase purchase or sale, or to issues with Coinbase charges or account settings, please check your Coinbase account first. You can contact the Coinbase support team for assistance: https://support.coinbase.com/
Known Coinbase Issue Updates
View the Coinbase status page for up to date information.
2/16/18: Some Coinbase users have reported duplicate transaction postings/charges for bitcoin purchases made with credit and debit cards. Coinbase is currently working to correct this issue.