CALL CENTRE CALLS EVERYDAY

OMW...what does Vodacom not understand...I cancelled my cellphone contract and am on Prepaid now(for a reason). Since I have been on prepaid from 1 July they phone me everyday for Tablet and data deals. I asked them to remove my number for any marketing deals and then the lady dropped the phone in my ear, since then everyday they phone me and everyday I tell them I am not working I cant buy any of their deals so please make a note on the system not to phone me...Perhaps I should change my Network because Vodacom I am fed up with your sh&^%tty calls.