Byjus — refusing to cancel my product - fraud

I bought a byjus courses for my child, while purchasing the counsellor who came to my house informed me that if i am not interested i can return the product within 15 days and it was also stated in my students copy. I am not satisfied with the product and i asked for refund within 10 days itself but they are refusing to cancel my course subscriptions. They are cheating. Byjus is fraudulent company.