My account has been reactivated now. Even though I was told that it is impossible to reactivate my account, I am quite sure it can be done because it's not some rocket science. And also as they are not at all able to find out and give me any evidence of the security threat I have caused to them, they have to reactivate my account and they did it. I appreciate their efforts, even though it is very much delayed. Better late than never. I have got responses from
[email protected]. I am not if I can give the person's name here. And also I have lodged a complaint in https://consumerhelpline.gov.in/ after which I have got the resolution.