Unauthorized billing on account

I have had a bad experience with Edgar's for unauthorized billing on my account of airtime that I know nothing about. I never subscribed to airtime with an company and give permission to bill it to my Edgar's account. I have gone in store since August I started receiving this bill on my statement to cancel it, all I am given are references each time. I am truly disappointed with Edgar's after being with them for a long time. The worse part I never received the airtime, how can I pay for something I never used or received. My question is why is Edgars allowing this to happen to my account, and I know I am not the only one because there are several people who came to the shop with the same issue. So Edgars is taking us for fools allowing 3rd parties to bill into our accounts without authorization. Something needs to be done because I am tired of this and keep on demanding me to pay for services never rendered. Why is it difficult to cancel, it has been 4 months going to shop for cancelation. Why people at the head office not doing there job. Something isn't right. I am truelly disappointed with Edgars, all I am getting is one reference after another and nothing happening for 4 months, but keep sending messages of demand and phoning to pay up. This is not on, and totally unacceptable