In order to change your registered phone number, please submit a support ticket with the category "Phone number change" and our support team will be more than happy to update it for you. 

Step1: Go to the "Support" tap from the Homepage:

Step 2 : Enter your registered email address and choose "Phone number change" from the Ticket category list:

Step 3 : Fill in the form as requested (If you are unable to fill the form in, please send the information requested in the form in an email)