Rediff.com India — Recovery of hacked email ID

Someone has hacked my email account viz [protected]@rediffmail.com and changed the PASSWORD, alternative mail ID and alternative phone number provided by me at the time of opening of the said email account.
My alternative email ID is [protected]@gmail.com and my contact number is [protected].
Please do the needful as early as possible and treat the matter as urgent.
Yours sincerely,
Sanjib Datta