Axis Bank (Noida Branch)
Illegal transaction in my account

I having a saving cum salary account in axis bank, yesterday i check my account and it show 3 transactions of Rs 7999 made through my debit card on 20 October which i have not made. now i have just Rs 166 in my account and i'm working in noida.

i have went to the bank but they said the transactions have been made through my debit card but my debit card was with me all the time 0n 20 oct.

Tell me what i shoul do now