Help required to leave the practice

Hi I was introduced to this practice by my friend to us back but last week only I attended a proper meeting. coming back home I found out that they had enrolled me as a member. So, I was having negative feelings already about the practice but after reading everyone's experiences of how they exploit innocent minds I really want to get out of it. so please help about what I can do to get myself out of this.

Also I just wanted to ask whether jusy chanting is fine or not or it will be better to practice proper meditation?