Edgars airtime **** / Adding airtime without my consent

Edgars has been billing me for quite some time for airtime that I never agreed to. I have queried it twice and both times they "referred" it to the third party and turned a refund down. I have explained to them that the cell number they have, I cancelled about 5 years ago. Thus it was impossible for me to agree to airtime on such a number. Should Edgars not refund me, I will definitely close my account with them. It is nothing more than theft from a corporate company already in financial distress.