Byju's Learning App — cancellation of my product

Website:

Byju's the learning app

Byju's counselor told that the product can be cancelled by me within 25 days and the fees which I have paid will be refunded in my account, But even after passing of nearly 3 months the product has not been cancelled and it will costing to me 7417 per month, they have requested me to pay 1st installment, then the product will be cancelled, same thing 2nd time, now I am not able to rest of installment, please do me favour, I have proper proof of this also..