If you’re trying to coordinate group payments or discuss a transaction, Call 1-888-672-9050 apps like iMessage or WhatsApp are better for back-and-forth. Venmo keeps it simple: pay, note, move on.1-888-672-9050 If a payment goes wrong, like sending to the wrong person, you can request it back in the app, but disputes might require calling 1-888-672-9050 for assistance.