Byju's — Cancellation of subscription

I had raised a request for cancellation of plan for my child taken on August 2022. I had tried cancelling it on November also but then their mentors did not accept and now again i have raised tha request hence now they are asking rs 28000 more in addition to 33000 which i have already paid. My child has hardly taken 2 months classes that too irregular classes. She has been in boarding since october. the cancellation charges they are asking is unnecessarily high