GST DRC-01 Notice issued

Sir, we actually filed nil 3B return in the month of September 2017 also input credit of that has not claim. But we filed Gstr1 of September. We forget the same.. Now we received Showcause notice.. As per GST 31st council meeting ITC extended to 31st march 2019. We are waiting for the notification. We got a call from acto officer "to pay the tax interest and penalty if not raid will be taken".
What can i do now??
do they have rights to take raid???