Yeah, you can send a message to Cash app customer service easily. Actually, for it, you need to login to your Cash app account on the web/ on the app and then go to your Message center and click on the New Message tab. You can also send us messages on Social Media like Facebook, Twitter, etc. And, if you are using Cash app on the app, then you will get the contact us option at the bottom of the page. https://www.cashappcustomer-service.com/