Byju's — They are not fulfilling their promise and not cancelling my order

I want to state that I, Sandeep Kumar had purchased IAS course for my wife Pooja Kumari in the month of Feb. Seerat madam was our councillor and she convinced us for purchasing it by telling us that we'll be able to cancel it with in 15 days after the delivery of the package. We got agree and paid 5000rs and gave our documents for EMI. After all the documentation done, I didn't received any video or link and no demo class. I many times asked madam seerat to send link, video etc of class but she didn't. Thus, a week passed and we received courier from Byzus. We received a tablet and the next day books. After receiving the tablet, we didn't find it helpful and told madam seerat about it. It had many problems. It was hanging and rebooting automatically. We explained our problem to seerat. Next day we received books and found they were not helpful. Same books I was already reading. So this course was useless for us. So I asked her to cancel the order. Then a mentor made us a call and gave us 14 days plan just like homework to a kid. So we requested her to cancel the order. She kept saying that she was doing but she didn't do anything. After 3, 4 days she gave a no. and said talk to cancellation department. When my called a madam picked the call and misbehaved with my wife. I again talked to Seerat. She said that she would do something and kept us hanging for 3, 4 days. She then started ignoring us, our calls, msgs. Then I said that I'll file a case against her if would not treat us well and after that I made a call to cancellation department, a mam picked up my call and she convinced me not to file case. She said that she had initiated my request I would receive a call and msg about cancellation. But i didn't receive any call or msg regarding cancellation. She just like seerat kept us hanging for about 10 days. In these days I made her many calls and sent msgs but she answered only few. For about last 10 days, whenever she picked up my phone or replied my msg, she said that she was checking.
Now I'm helpless. Therefore I request you to take suitable action against byjy's and it's these two employees
Thanks
Sandeep Kumar s/o Sh. Prem Chand
Vill. Tihri PO Phahal Teh. Galore Distt Hamirpur HP 177026
Mob. [protected]