State Bank Of India [SBI] — atm machine tirupattur branch

Mohamed shoiab
Sir i have withdrawal 4000 rupees cash from the atm machine but the machine has withdraw only 1000 rupees and it shows the atm receipt for 4000 rupees though i have received rupees only 1000 rupees from sbi bank atm. And then i have withdrawal 2000 from same machine but it was withdraw only 500 and debited 2000 rupees.
Though my account was in union bank of india for my necessary i had withdraw the money from sbi bank atm but i have cheated by that atm.
Sir please help me.