If you're unable to log in to your Robinhood account, you can contact their customer support through the following steps:
Visit the Robinhood support page at help.robinhood.com.
Click on "Contact Us" at the bottom of the page.
Choose the relevant topic, such as "Account Access."
Select "I have a different issue."
Follow the prompts to submit a support request.
Alternatively, you can reach out via their social media channels or use the in-app chat feature if you have access to the app on a different device.