Smart move Maria !
The study will be out of your mind in no time, glad you noticed it was a cult, not associating with others that don't belong, does that sound like something a loving God would do, of course not !!
Forget them and get on with your life and if they contact you again (and they probably will) to see why you stopped or if you want to start up again say NO !! and please don't bother you again !!