Byju's — Installation issue

I had purchased byjus kit for my daughter and paid 8000 rupees for the Byjus admission purpose, but till date mentor or sales person have not contact with me. i had called several times to the counsellor and the got the same reply we are trying to resolve the issue but there is no response from the organization.
But My ward has lost interest in learning with Byjus app due to such delays. So I decided to cancel the Byjus.
During the admission, the counsellor had promised me that he will help me to cancel the Byjus courses. After knowing that my ward is not willing to study in Byjus.
To cancel the same I asked help from counsellor to cancel my courses. but no one helping me out..