change of mail id and mobile number

HOW TO CHANGE EMAIL ID AND MOBILE NUMBER OF AUTHORISED SIGNATORY IN GST IN SIMPLE 9 STEPS

a) First login... and use non-core amendment option.
b) Then edit existing authorised signatory... remove checkbox from Primary and Save.
c) Add new dummy authorised signatory (we will delete it later in step f) ... with names and other information, unique PAN (you may even enter AAAAA9999A), correct New Mobile Number (NM) and New Email id (NE). Do not forget to select "Primary" check box and save.... Even pdf and photo attachment can be anything. Since ultimately we will delete this info in step (f) so do not give too much though to what to attach and what not to attach.
d) The moment you save, OTP pop up will appear and new OTP shall be relayed both on NM and NE. Enter OTP.
e) On OTP validation system will replace Old Mobile Number (OM) and Old Email id (OE) with NM and NE respectively.
f) Delete authorised signatory just added in step c)
g) Go to authorised signatory, edit the one from Step b) and now select "Primary". The moment you select it, you will see your NM and NE in place. Save it.
h) Sign and submit...
i) Voila, its done!

Disclaimer: This process is valid at the time of writing this post. GSTN may change process anytime. Best of luck in your endeavours.

For any problems feel free to reach

caarham2011 @ gmail.com

I have tried the same but it's not working.

ADD DUPLICATE AUTHORISED SIGNATORY 

can you please share your number,I can call you

is query get resolved???