Go Air — refund of money

I sent a thamks mail to you 20 mnts ago.
Someone rahul called me from mobile no - [protected], and asked to give my atm details, so that he will refund the money.
After few dialogues... I told him doing this some can hack my more money, or may be you will do this. He told i, m not asking pin, give me only 16 digit details.
As i told - i have already received money... Mobile [protected] disconnected.
Please take care, he is in touch with mails of airline company.
I am posting this for general interest and information.
Thanks.
N. J.