Why can't I modify my mobile number/email address?

In order to safeguard all the SEAGM user's account, users are required to do several identities checking upon their request for changing mobile number/email address. 

Kindly contact our customer support Live Chat 24/7 to modify your mobile number/email address and the below is the information needed for verification purpose. 

1) Registered name and username:
2) Registered Phone number (OLD):
3) Registered email:
4) Last purchase date:
5) Last purchase product:
6) Payment method used: