Hongkong & Shanghai Banking Corporation [Hsbc] — credit card bill

My conversation was with Vandana Team leader from customer care. I want to know about Bill details and I have paid against that bill amount however she has informed me transaction wise details which I was not able to understand, My credit card ending with 8388 From starting till now I have calculated the bill in total (Bill amount per month) it is approximately 90000 to 1 Lac not more than that however when I calculated my amount which I have paid to you from month of June 2017 till now was Rs 142800 Kindly check and sort this out otherwise till the time I will not pay any amount You can also keep in touch with me on my cell any time I never expect this from HSBC bank.
I always pay the amount on time and extra amount again you have sent me the bill of almost 5700 and future bill will be for 5100 why should I pay if I paid extra amount.
Kindly sort this out.
Nishant
[protected]