Reliance Smart GSM — Balance decreased due to unwanted subscription of MUSIC GOLD

Address:

Gwalior, Madhya Pradesh

Yesterday I recharged my mobile by 150/- plan.
Today a massage informing "your subscription to simply music gold has been reneewed at Rs 25/-" appeared on my mobile and my account balance reduced by that amount.
Why is this continously happening on smart sim.
Do they want to lose their customers? Return my balance otherwise I will take necessary legal action.
My Mobile No. is [protected]
and my email id is [protected]@gmail.com