Without my permission additional interest target

Hai sir my name dhanaraju gummadi 13- 10-2026 th I bought a TV mobile on Flipkart.Additional Warranty I selected IDFC Bank and bought through No Cost EMI. I postponed it for nine months.They said no cost EMI for nine months too. The first month's installment has been cut. The installment was cut and when I checked, they charged me 4000 in interest. I called Flipkart and asked, "Hey, this is a no-cost EMI, why did you charge me interest?" But they said it has nothing to do with us, the bank itself charged you interest, go and ask them. I asked my IDFC bank and they said we have nothing to do with it, you bought it from Flipkart, ask Flipkart customer care. Flipkart people say they have nothing to do with us, banks say they have nothing to do with us. The total value of the purchased items is Rs. [protected] to be paid through no cost EMI But they say pay me this amount of 53281 with interest. 49044 This is what I have to pay.49044 They are asking me to pay 53281 with additional interest. Please help me