You can easily change the contact information for your domain at any time through your Listedhosting Account panel.
In order to do this, follow these instructions:
1) Sign in to your Listedhosting account (The Sign In option is available in the header of the page):
2) Select Domains from the left sidebar and click the My Domain
3) Click on the Domain date of the domain you want to make changes too.
4) On the right side, click on the Contact Information option to make changes.
5) Click on Save Changes.