Byju's — Cancel my subscription

I purchased this product 10 months brfore and during purchasing time the councillor fooled my parents by saying you can cancel it anytime.
I am now facing a lot of issues on it and now when I wanted to cancel it then they are saying you can only cancel it within 15 days.
Byjus, my humble request please don't play with our money. It's the earnings of our parents who are spending for our goodness and now when we do not need, please return this course.. don't give refund but at least take this product back and stop deducting money from our pockets. Now don't show your privacy policy and simply cancel it.