Kolors — Over charged

Without taking any treatment we could not judge whether the treatment is worth for me or not.
I have agreed for a treatment worth 80000 all by listening to their words.
I paid the amount and then when I took the first sitting treatment I am sure that I feeling it as it is not worth 80000 treatment. I want to discontinue this treatment after my first sitting of the treatment.

I approached Kolors for discontinuing my treatment and I am fully agree to pay for the first sitting which I took.
Kolors BTM is not agreeing for this.
Help me discontinue and help me come out of this EMI loop of 80, 000.