Byju's — Unauthorized calls from the company

I purchased the trial pack for one month BYJU's study program for online basis which was costing INR 5, 000 (full refundable) on December 17, 2021. They assured that in case the study program is not continued by the purchaser, the amount would be refunded in full. The class started from December 29, 2021 after the consumables (on full-refundable and returnable basis). After that, I called them on January 22, 2022 to inform them that I wish to discontinue the class and I cannot afford the same. They informed that the class cannot be discontinued. I replied them that the person contacting me has informed me that in case I wish to discontinue, I can while informing them before February 7, 2022 which is the end date of the trial pack. I again called BYJU's on February 22, 2022, or discontinue the services and ask for the return of the kit and refund of the amount.
After that, they also informed me that in case I wish to continue post February 7, 2022 (End date of trial pack), I would be charged INR 87 per day. They in turn responded to not discontinue. They then coerced to pay the amount for the entire year which was otherwise not informed. I also discontinued the ECS services on February 4, 2022 for not paying the fees before the said date.
They are continuously calling and SMSing for the payment. classes, and other such updates from White Junior. They also forced me to pay the BYJU's product which I am not wanting to keep with and intending to return.
On April 18, 2022, I received a threat call which mentioned that I have to pay INR 58, 000 for the services I availed in the entire year which I have other not. The classes has already stopped since January 20, 2022, but BYJU's is still asking for the pending payment.