ICICI Bank — Bank asking amount which was not swap from credit card account

Hello,

I have bought an electronic item 22 Nov 2020 from Amazon which is 9 month EMI. amount is 37500/- via ICICI bank credit amount.
on the same 22 Nov 2020 bank debited 1st EMI amount from the i have paid to bank for the older transaction. and this should not happen as per my understanding.

That online item i have returned to seller and account credited amount 37500/- to credit card account. Also i have requested the customer to stop EMI hence, but my question to bank why they debited amount from my transaction as 1 EMI.

In credit card that amount still showing outstanding. 4420/- which is surprise for me and shocking. this is really pathetic service i was served from bank.

I was shocked when the customer care asked me to pay this amount and next bill cycles bank will credit 4420/- amount.

but my question is why I'm give that amount which is not swap by me. only for there adjustment they asked me to pay to credit card account.

Hope you will take this forward and solve my issue ASAP

Thanks,
Sameer M