As I have experienced, I also followed the same way as your college people are doing and got to this position of a
Call Center Manager after so long. I enrolled as an assistant in a small firm and as you have said, making contacts from the place I worked I got up to here.
I am not saying that I am not satisfied with what I am now, but to be honest to myself, I could not take my studies with my work as I thought. So qualification should be given the top most priority though you work. And when you get qualified then you will have lots of opportunities in your hand. You will have qualification, experience from your previous work, and you can continue with the same work until you will not have the work as your qualification.