HDFC Bank — ATM withdrawal

Today i tried to withdraw 4000 from HDFC Atm. As it is having only hundred rupees notes, it said max withdrawl is 4000. But only 3500 came out from ATM. In my account 4000 has been debited. Please check and revert back my money.

FYI

ALERT:You've withdrawn Rs.4000 via Debit Card xx1727 at +KONDAPUR OATM on[protected]:19:32:55.Avl Bal Rs.61096.37.Not you?Call [protected].