HDFC Bank — Forex Card problem

Address:

Hyderabad, Andhra Pradesh

I have taken a forex card on 15th of april 2015 and when i used this card to withdraw money from a bank of america ATM the money have been deducted but i dint receive any cash. However it has been reflected in the bank statement that my balance is 683$ later but when i try to withdraw my money next week it shows only 83$ as balance and online statemnt shows that i have withdrawed money which i dint.