Rediff.com India — Rediffmail mail account been hacked along with password reported to be found in data breach

Address: Hyderabad, India

My rediffmail account is not accessible with my existing password since 2 weeks. Attempts to recover password shows that the alternate email ID and the mobile number provided for retrieval are not related to me and seem to be hacked or changed by some unknown source. Further the chrome browser says that the password has been found in data breach. This is alarming problem since I am unable to access my rediffmail email account.
On trying to change my password, the phone number for retrieval/change of account password is noted to be having country code "+1", i.e., phone number related to United State, which can't be possible for me who has Indian phone number i.e., "+91" country code. Further the alternate email id for account retrieval also is some unrelated account.

My email account (****@rediff.com) has very important official communications and bank transaction information and all my bank and email correspondences are linked to this email account.

I have sent the query to rediffmail India customer support ([protected]@rediff.co.in). They have given generated a ticket for my complaint and asked for details about my problem on 17th Apr'24. But the problem is still not resolved till today 28 Apr'24 and I am not getting reply to my queries since 19th Apr'24. The email account being very important, is still not accessible.

I request the rediff.com India to provide technical support that can quickly resolve these hacking issues on a time bound basis and if needed arrange for quick redressal cell for technical issues related to retrieval of rediffmail accounts that are subjected to data breach.