Pathetic service by HDFC Bank staff without any resolution of complaint for last few

#1
I had availed Credit card with HDFC Bank limits with 45K. I had with proper payment in the initial stage. In the last time due to bank holiday I asking the payment through netbanking but the banker not allowed to pay through netbanking and paid by cash. That same month the same amount also debited from my bank account. I asked many times through online and phone calls and direct banking branch. but no response. The same time they are also hold my account. If there any norms or policies there that the bankers can take the amount from the customers account without customer knowledge, Pls explain.
 

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