Byju's — Delay in cancellation

Address:

Byjus Head Office, Bengaluru

We have bought the subscription of the product on 31 may 2020.
We are asked to mail the company within 15 days if we didn't like their product. We mailed within the time limit but even after 3 months they are calling us on daily basis for EMI payment (even on Sunday).we were told that cancellation will be soon completed but neither they have cancelled the course nor they have stopped calling us.