Kotak Mahindra Bank — Credit card details not available in net banking app

I had a credit card of kotak bank of a limit of 25000. I used it and paid Rs 10000 but without my permission they reduced the limit to 17000 as soon as I paid the amount due to which I was not able to use the amount that I have paid. Then I could not pay the dues of September 10th which I paid on October 1st 2021 but to my surprise the Kotak bank removed all details from my kotak net account and showing as no card available due to which I am unable to see what I have paid and the dues that I have to pay. I sent many emails but neither they are giving any proper reply nor they are allowing me to see the details of the credit card. Credit available is 1600 but still they are charging over limit fee and not allowing me to use the credit card by blocking it.