You can respond to a dispute on the app or web version. You will be prompted to provide evidence to support your response. The evidence may include any relevant documentation, such as invoices, receipts, or shipping information. You should carefully review the dispute reason and provide evidence to address the customer's concerns. If you does not respond within the given timeframe, the payment will be reversed, and the funds will be returned to the customer.
For more information, check out How to respond to a dispute?