HDFC Bank — Unknown amount deduction

Address:

Bangalore, Karnataka, 560055

I have a HDFC account number : [protected]. 2 years back I was staying in one rental house. I had received a call from hdfc customer team and they told me that I can pay a BESCOM bill through HDFC. So then I updated my bescom account ID and set my account for manual payment. After that I used to pay bill and my friends and families bill through hdfc because that was a good feature. Now the HDFC changed manual payment option to autopay without informing me and they have deducted 5, 297.00. Rs.5297 is not my bill. Why the HDFC cheating this way without any notifications. This happened to my friends as well. They all are got shocked and started discussing about their money deduction. Requesting Consumer Complaint team to help me to get my money back. Some times I will add 4 to 5 bescom IDs to my account if they tell me to pay the bill. If hdfc changes this option to autopay without informing customers, do I need to pay all of their bills?