Simplilearn — To cancel the course

I have opted for the course PGP in data analytics and paid the down payment amount of ₹7345 on 8th August and then the remaining amount was converted into EMI with the third party Liqui loans and now I'm paying ₹11771 monthly i couldn't understand the teachings in live classes and self learning and asked the simplilearn counsellor to cancel my course and she said as per their policy they can't refund. So i said i don't want the amount which i paid for last 3 months and I'm unable to pay in the future.
I am not in a good financial position to pay 12000 pm. Please assist in cancellation of the course.