Union Bank Of India — Money got deducted from my account

I made an ATM transaction on 11th December of RS.3000 earlier i tried for 3500 but money was not dispensed. On the same day i got to know that my account is freezed. I contacted the bank on 14 december and they resolved my issue. On the evening of 14 december Rs 3500 got deducted from my bank account. I called the customer care executive and they told me that we couldnot write your complaint at this point of time, please contact your bank as i live in delhi so i asked my friend to go and report my issue to the bank. The bank executive told me to wait for 15 days. They didnot issued any complain no. From that day i am asking the bank manager to look into my matter but he is not helping me in getting my compliant resolve. He told me in january to write an email regarding your complaint i did that but I havenot got any reply from the official bank email id. I asked the manager personally to help me out sir and today he said your request was rejected. I asked him to provide me with the complaint no. But didnot do that. He asked me to send the screenshot of my complain to his WhatsApp no. I dit that also. But got no satisfactory response