To register a cash app dispute for a cash card transaction, you will need to select the transaction in the Cash application. To do this: Firstly, touch the Activity tab on the Cash App home screen. Then, select the transaction in question and tap … in the upper right corner of the screen. Consequently, select Need help and support for cash applications. Touch Dispute this transaction. If you want customer support then you can contact us on our website. Our technical team definitely helps you.