Byju's — I cant cancel the course after 15 days they are saying we have to continue with course even if you are not intrested

I have taken byjus gate preparation course and i want to cancel the course there are saying that one cannot cancel the subscription after completing 15 days they are saying we should continue if we are not interested also.
previously one person called and said that they have initiated refund process and now they are saying they cant cancel the course and saying we have to continue course if not interested also they feed back is delayed to mail or call and increasing the days so that the person is not able to unenroll the course after 15 days.