Cash App payments are instant and generally cannot be reversed once sent. 1-855-535-5829 If you accidentally send money to the wrong person, your best option is to request a refund from the recipient. If they refuse, you can dispute the transaction through Cash App support. Refunds are not guaranteed, so always double-check details before sending money. 1-855-535-5829For further assistance, call 1-855-535-5829, a toll-free number for expert support. Enable security features to protect your account from unauthorized transactions.