Rediff.com India — rediffmail hacked

Address:

1161, ratan lal nagar, Kanpur, Uttar Pradesh, 208022

My mobile phone was robbed on 17 march 2019 and after the incident my rediffmail account [protected]@rediffmail.com has been hacked and all its data like password, recovery mail and registered phone number has been changed the earlier password was 6 digits the new password is ten digit-ed.
The mail belongs to my firm and contains official emails of some well reputed pharma companies like abbot, lilly, novartis, gsk, sun pharma, bharat biotech and many more

please help me recover my account.
The account details are
email: [protected]@rediffmail.com
acoount holder name: Rajesh Bhasin
recovery mail: [protected]@rediffmail.com
my contact details are:
Vijay Bhasin
[protected]
[protected]@gmail.com