If your purchasing is shown on your bank account but the cash app hasn’t confirmed it yet then in that circumstance you must cancel the payment as the payment is still not been accepted by the recipient. If users cancel the payment within 24 hours of processing the transaction then your funds will be null. The cash app will never let you cancel the payment as payment is finished immediately and is possible to cancel when the Cash App Payment Failed.
https://helplinesupports.com/cash-app-refund/
https://helplinesupports.com/cash-app-issues/
https://helplinesupports.com/cash-app-problems/