Byju's — refund and cancellation of premium

Address: 1st floor, J-70, paryavaran complex,ignou road, New Delhi, Delhi, 110068

I received the tab on 4th may, 2019 and was told that my ward will be getting 15 days for demo and it can be cancelled whenever i want to within the 15 days. I sent a cancellation request and talked to customer care center and through some misunderstanding my cancellation request was closed, i never "confirmed it" and received no email about the cancellation being closed. My 15 days of demo are still not over yet so i contacted them and they said we can not cancel the premium now since the cancellation has been closed. I told him there was some miscommunication between the customer care executive and me but no cooperation and support from them was received, i requested them for refund again since the 15 days are not over yet and again they told me that i can never cancel this premium until next year. The request for loan has been sent to capital float for 35000.
I have until tomorrow which is 18th may, after that there is no hope for cancellation and i expect them to open the request for cancellation again by tomorrow.