The following steps will show you how to remove your number Truecaller and unlist it. Removing your number means your stored details eg Name, Email and Website will be erased.
Click on that three dotted people icon at the upper left
Click on Settings
Click on Privacy
Click on Deactivate
After deactivation, go to the Truecaller unlist page to unlist your number. Enter your number and click UNLIST PHONE NUMBER.