Byju's — Cancellation of byju's course

I have requested cancellation of the product with in 14 days ( rule is we can cancel the product with in 14 days) after following up for 1 month they have initiated cancellation process and sent 2 mails that one mail is that they will refund 10000 after receiving the tablet, other mail is stating that they will refund the remaining amount 52000 with in 10 days. After 10 days when I called them now they have changed the version like they will refund the total amount only after receiving the tablet. As the process is getting complex we decided to keep the tablet with us and called support team they said they will arrange a call back from concerned team, we did not receive any call back from 1 month.i keep on calling the customer service but no use also i approached byju's grievance team which is name sake team, also i sent mails to cancellation team, this is also no use. I do not know what to do now. I request all the parents to think twice before taking byju's course. Byju's is no 1 fraud in all terms.