HDFC Bank — Credit card charges ambiguity ,no customer care support

I have tried to connect with hdfc customer support but only electronic replys are there no support. I have no cost emis from amazon which are coming more than atated earlier, and other charges as well. And now i have no support to understand why they are chargung high. And why there are other taxes. No support for credit card. All ai chat bot and calls are there. Nones to solve the actual problem