Sometimes it happens when the required amount does not dispensed from ATM but the actual amount get deducted from your account.
Many people has faced this issue. Actually this is a technical fault of the ATM.
If this type of scenario happens then do the following:
1. Keep the ATM receipt with you for the reference number.
2. Contact Bank Immediately.
3. Check your Bank Statement also make a copy of your statement as proof.
4. Write and drop a complaint in the complaint box present in the ATM.
After explaining your problem with bank and after verification from bank’s end your money will be refunded in 7 working days.