Axis Bank — a call from axis for debit & credit card limit increase

Address:

Belgaum, Karnataka, 591128

I got call on 14/02/2019, from [protected], [protected]
Saying that it's for debit & credit card enquiry, so i asked them to increase my credit card limit then they started processing
Then they asked me card no., it's expiry date, and said rs 8400/-will going to be credited, and they asked me for otp,
It's my mistake too without checking i gave them otp and my amount got deducted rs21500/-,

Immediate i tried calling on costumer service but it's not connected..
Please help me get back my money..
It's a humble request.. Please