Regardless of what the issue is, one thing is for certain: using Cash App is secure. If your payment fails or if you have been scammed, you always have the option to get a refund. Cash App is not an FDIC-insured payment app, however that does not mean that you cannot get a Cash App refund. If you lost money using Cash App, you are able to retrieve it by contacting the Cash App customer service. You can either call the toll-free number or send an email to the Cash App customer service.