MCent — I cant add my phone no. plz help

Address: Khordha, Odisha, 751021

Website: This is a app bowser app

I cant add my phone no. Nor i am getting any option of adding my no. As i opened with facebook plz help i need to claim rewards plz help
I initially logged in using facebook and log in was easy i wanted to check minimum points required for getting a recharge then i faced that i cant add my phone no.in the photo provided u can see even pressing anywhere it does not respond
Plz help me add my phone
No.