Ca not giving gst username and password

MY CA APPLIED FOR GST REGISTRATION AND UPDTED HIS PERSONAL CONTACT DETAILS WITH MY GST NOW, I WISH TO CHANGE MY CA BUT THAT PERSON IS NOT GIVING THAT TO ME SO PLEASE GUIDE ME WHAT TO DO NOW BECAUSE HE IS FORCING ME TO DO ALL MY ACCOUNTING WITH THAT CA ONLY. AND I HAVE TRIED TO RESET USERNAME AND PASSWORD BUT OTP IS GOING TO THAT PERSON MAIL AND MOB. PLEASE HELP ME HOW TO CHANGE THAT MAIL ID AND NUMBER.