Byjus — Cancellation about my course

I have purchased Target 2022 IAS from Byjus on February 2021in Chennai office by paying Rs.8000 through DCEMI for my wife. She is working and the Byjus person said only 2hours a day is enough to study daily. Once we received the Tablet and called Mentor, that person said its necessary to spend 4 hours a day. The same day we called the person who gave counselling to us but he didn't pick the call. She somehow managed to study but after 20days my mother who is a heart patient got severe heart pain and doctor advised my mother to take complete bed rest. Now noone is there to look after my two daughters. So we called the Byjus person and he never attended the call. Continuously we called from some other number. Finally he messaged that I should send cancellation through email. After that my wife received the call. They really don't understand our situation and the reply what we got from them was No way to cancel the course. My wife informed them clearly that she don't have time to read but they are saying that they will arrange for Mentor. Really I felt this is a fake promise because while joining the counselling person said since my wife is working and she will be having work pressure so 4 sets of counseling people will take care. But no-one has given counselling. When she calls the mentor they are saying only the schedule and not saying anything else. Finally when I say my mother is not well they said after two months if she gets normal that time my wife can continue. No proper coaching and schedule was given to my wife. Their way of approaching is worst when we ask to cancel the course. We also added next month onwards we can't maintain sufficient amount in bank due to heavy medical expenses they are talking very bad. So kindly help me to return back the tablet and book materials to them. I have informed them not to refund my Rs.8000 which I have paid through DCEMI still they didn't listen to our words.