State Bank Of Hyderabad — atm cash withdrawal

Address:

Krishna, Andhra Pradesh

on[protected], I tried to withdraw amount from S.B.H. ATM which is in near N.T.R Complex-5 route, Vijayawada at around 2.00 to 2.30 pm... but, there is no response from ATM about amount, it replied me " your Transaction timed out ".. I think there is a fault in the machine and went out.. but when i seen my Mini-statement on Monday, I was shocked and realized that 300 rs are debited from my account. I am helpless and what to do now?. My account Details are,
G.Vasu Babu,
SBI A/c no.[protected],
Bhavanipuram Branch,
Vijayawada-520012.