Byju's — refund

I have cancelled their product on 18 th dec and didn't receive it from courier company. Next evening someone from refund department called to confirm cancelation. I got an email from mr siddharth yadav regarding this on 22 nd. He asked for bank details which i provided. Yesterday on 29 th when i called about status they said that product has been delivered. When i refused they again asked for bank details which i provided. Today again when i called they repeat the same thing about product delivery. Then he some guy named vishal said he is initiating process. Meanwhile my emi will get deducted. Since it is outsourced to another co. It is really irritating