Byju's — Cancellation of subscription. Stop EMI

I was contacted by Byju's salesperson on Apr 8 for a session on their learning portal. After the session, we asked for a day's time to decide on our enrollment. However, this person kept saying that there won't be any discounted price later and we can cancel it within 15 days after enrollment. We were lured into enrolling their 3 year couse for Rs.56000 and went ahead with EMI option. The next day we decided to cancel the subscription and raised a cancellation request 29279637. Since then, I've been following up everyday but to no avail. Their so called mentor called me randomly later and was insisting on talking with my kid to proceed with cancellation. Not sure why they require feedback from a 5 year old kid. Despite raising the cancellation request, they kept sending their learning materials. On top of this, we are being pushed to accept their course by their long winding stories. What's more frustrating is they are asking me to courier back the learning materials rather than collecting them. I've been telling them everyday not to dispatch any of their materials. I want this subscription to be cancelled immediately and my loan reimbursed to the bank. Byju's is becoming another scamster organization with their poor support and luring people into losing their hard earned money