Note that you can only refund cash app payments that have not yet been claimed. If the payment has already been claimed, you will need to request a refund from the recipient.
It's important to communicate with the person who sent you the money and explain the situation to them. They may be able to cancel the payment or initiate a refund themselves. If you are unable to resolve the issue with the person who sent you the money, you can contact the cash app customer service for further assistance.