Bad service

I am so fed up with iq academy! I have registred with them I did not receive any confirmation for registration or whatsoever, I was told I was going to receive student number as soon as I have registred of which I did not. I decided to deregistered with immediate effect! I was told that I am deregistered I even received an email confirming that I am deregistered..but I keep on receiving calls about my iq account, of which I am confused because I have nothing to do with them, there was no service rendered to me by them. Their consultants are rude as ever!