Byju's — Cancellation of the Byju's early learning product and refund

Hi I had taking early learning product from byju for my son UKG. But he is not able to follow it up or understand it properly and not able to get it properly. Only watching videos and not able to understand. Its been a month now and form last week onwards we are trying inform teh byju its not worth for us as its not giving us result and not able to follow as well. its waste of money for us to keep now and i had taken loan to get this product for my son. Now just keep saying 15days cancellation policy and not to refund. It does not make sense to that if the child is not able to get what is the need then what is the use of the product. Atleast they should call and and tell us what best can be done in this situation. Its not done and no body is ready to talk apart form mentor and no sr official or marketing team or sales team.
Please help in getting this resolved.