Canara Bank Nit Branch — Missing funds & Transactions not Disputed

I hold an account with Canara bank since last five years. A/C# 5339-NIOT Branch-Chennai. Few months back i used my ATM debit card for a transaction for an amount of INR 600.00 at a hospital using HDFC terminal. I was told by the hospital person that the transaction did not go through on the first attempt and i was adviced to use the card once again which i did thinking it was not authorised the first time. Later i ended up paying twice. Its been six months now every time i speak to them they do not seem to solve the issue. Rather i was directed to the hospital and the acquirer bank HDFC on whose terminal the card was used. But they directed us back to the account holding branch. When i spoke to them most recently i was told the same procedures to be followed again. And most recently funds have been missing from my account. I was told that an amount of INR 53.00 was withdrawan as cash from the atm at 4.00 pm on a given day this month. On that particular day i was at home and i usual dont use cards very often. I walk into the branch to withdraw cash. More over no Indian banks or ATM's allow cash to be withdrawn in such an odd amount. Even for Swipe Usage no one Accepts Card Card Below INR 100. When i questioned about that to them, they came back with an answer saying its your card and you have used it we only have an information about the time and the amount.