More details in the press release. The complaint against Apple is the the UI led some people to think they had competed a dispute, when there was an additional step. The complaint against Goldman is that their backend systems were broken and they failed to act on the disputes.

Failing to process or share consumer disputes: Apple Card users were directed to dispute transactions through a “Report an Issue” feature in the Wallet app. For some disputes, Apple sent consumers a separate link in the Messages app asking for more information. Apple failed to send these disputes to Goldman Sachs if the second form was incomplete. Even after Goldman Sachs alerted Apple to this issue, the problem persisted. As a result, neither Apple nor Goldman Sachs investigated tens of thousands of such disputes and cardholders were unfairly held responsible for disputed transactions.

Failing to investigate cardholder disputes: For the disputes that Apple did send to Goldman Sachs, the bank failed to consistently send acknowledgment notices within 30 days, conduct reasonable investigations, or send resolution letters explaining the determinations of its investigations within 90 days. These failures led to Goldman Sachs illegally placing damaging information on consumers’ credit reports and holding cardholders responsible for potentially fraudulent or unauthorized purchases.