Kolors Health Care India review: Deducting money after opted out before the service started

Name of the Agency -Kolors Health Care Pvt Limited (Gachibowli Branch)
Type of Service -Slimming Course
Dated 22-10-2019
Total amount -45, 000.00

I visited the agency Kolors Health Care Pvt Limited on 22-10-2019 for the slimming course .When I visited that agency, they informed me regarding the slimming course fee.
I told them it's not possible to avail the course, as I have some financial issues as well as I need to discuss with my family and my doctor before starting that. So I informed them that I will visit next day if I am interested for this course. But they started forcing me and informed me that they have some offer for that day only. I told them that I dont have money and may be I will not take this course because I have some issues.
But they told that I can cancel this enrollment later if I want.
I asked them that if I didn't like the services whether I can cancel the booking or not, they responded that I can cancel .
As I told them due to financial issue I will be unable to pay the amount, so I will visit the next day for the booking confirmation if I need the service.
But they forced me to enroll by that day because they had some offer and told me that I can pay via EMI .
They had also told me that I can cancel my EMI within few days before the service start If I don't want this service.
At the same time they asked me for my debit card and told that they have processed for the EMI, as the EMI amount is -5, 296.17 and told me that I can cancel the booking within few days if I want.
The next day, I visited the office, I told them to cancel the booking.
Firstly they started arguing with me and after that they told me to provide a letter of withdrawal of services which they will send to the respective higher authority to cancel the EMI.
I provided them the requested letter for cancellation and they said that within 10 days they will cancel the booking as well as the EMI.
I submitted the membership card which they issued to me on the first day.
But till now they haven't canceled and they have deducted 3 months EMI, Dec 2019, Jan 2020 and Feb 2020, and now they are saying that they will not refund my amount .
As per consumer I haven't taken a single service from the agency, but they are deducting the EMI amount, I have even contacted the bank, they said me that till they don't get any confirmation from the merchant, they cant stop EMI, as per consumer I want to look into this matter, refund my amount and cancel the booking as soon as possible as its been more than 3 months .