Gst registration validation error

Dear All,

We have done the GST registration of firm having 2 partners after getting provisional Certificate one Partner name in the pan has been changed.

Now after login that portal  is showing "Access Denied" and it is not giving option of selecting any tab. On enquiry with GST help desk came to know that details of the pan are not matched with CBDT  database and given solution of (.Kindly fill the details as per PAN details and resubmit the Form).

Now my issue is how can I resubmit the form as portal is showing "Access Denied" and once I login it is not allowing me to click any tab there.