During registration, you should receive a confirmation email on the email address you used to register. To validate your email, you simply have to click on the link "Confirm my email address". To verify that you entered the correct email address, go to "My Account" and "Profile".
To go to your phone number, you should click on "My Account", "Dashboard", "My Profile", and validate both your phone number and your email address.
After clicking on the verification process, you should automatically receive a text message with a code. You need to enter this code in the space provided for it, so your phone may be verified. Read more about How can I validate my email address or telephone number? I did not get the confirmation email or text message.