Rediff.com India — Extremely poor support by rediff support team

My father’s ID got hacked and the hacker has been using it to send phishing emails to all of my father’s contact. Hacker has changed the recovery details for the account so we are unable to recover it. We reached out to customer care team and their response has been bizarre. They are asking questions like when the ID was created. The subscription details, last latest emails received, their subject, date received. This is totally none-sense. Who can remember these details. My father has not been actively using that account and found out that it got hacked when he started receiving calls from his contacts about receiving phishing emails.
I am highly dissatisfied by this unprofessional behaviour and third class outdated policy of rediff.com. This site should be banned from the internet as a lot of information they have would be at risk of being hacked.