Mahindra And Mahindra — offer letter I received is true or not?

Address:

Mumbai City, Maharashtra

I received a call to my mobile number and they said my resume is selected for mahindra & mahindra ltd. And asked for secured deposit amount. Send one account number, ifsc code, bank details to my mobile number. I also transfer the amount and i also received one offer letter from one mail is hrsneha. [protected]@gmail.com
But now i have a doubt it may be a fake call and fake offer letter.