Byju's — haven't received any proper guidance

I had registered free demo course from byju and the same day they came for registration.
That day i was not present at home and they get the papers signed from my family members without providing any full information.
Non disclosure of policies.
And now i have to pay the subscription amount forcefully and they don't have any cancellation policy.
I am financially low so i am not able to pay the future subscription.
I request them to cancel the subscription but they are not listening to me and not giving any proper response. Kindly do the needful as soon as possible.
My registration no. Is tnl[protected]
In the name of daksha.