Sh. Mohammedrafijul Hoque Ji,
For rectification of this mistake, you are suggested to see the jurisdictional GST Range Officer and discuss the whole problem with him. If the officer may talk to the Officers of Common Portal System and, thereafter, your account on portal may be allowed to re-open for rectification. Request in writing for help of the department. You will have to make efforts in a polite manner. Do not hesitate to see the higher officer of the department, if needed. I hope your problem will be solved.
The officers of the department are very co-operative. My client's problem was solved by re-opening the account on portal. Problem was of different nature. What is worthwhile to mention that freezed return was opened to rectify the mistake. One has to be submissive and polite.