Byju's — Cancellation of product SO-[protected]

I have opted for Byju's product on May 2023 and due to some reasons, I raised a cancellation request on customer care within 15 days. On the telephone, they assured me time & again that their cancellation team contacted me soon and cancel the product & refund my money. After two months they told me that I have not informed them through email. Even they did not stop my EMI. Kindly help me.