Open the Statement tab, tap the ride or line under Every line, pick the reason and say what you expected. You get a ticket number, and someone replies within five business days; a correction lands as an adjustment on the next statement. To dispute the statement as a whole, tap Dispute it within 14 days of its issue.
How do I question a line on my statement?
In the app: question a line within 30 days, or dispute the whole statement within 14 days of its issue.