Login credential not received at registered e-mail - gst new registration.

Dear Experts,

I have applied for new GST registration by CA. I use our  Mobile number and domain email ID of the client We received the GST No over the registered mobile number but don't receive Login credentials (GST ID  and Password) over domain email ID. Is there is any way to get login details or change the email address in TRN Application? Your reply is highly appreciated.  i had escalate this issue to GST grievance.  Still i am not getting the solution.

Regards

Suresh. G