Paying for airtime i did not receive

I am not happy about the service I received from Edgars recently.<br> I got my statement from them I notice I'm being charge for MTN airtime which I have never received.<br> I called to ask when this started and one consultant said June 2015 and they will refund me if I say I didn't get the airtime.<br> I got a ref# number from them and when I called for a follow up the person I got said they not sure if I will get a refund and not sure when this airtime subscription started. They can't see that on their side. But however it has been cancelled and a refund will be done. I asked how much the refund will be and she just said she can't tell me that.<br> So who will tell me all this info since Edgars doesn't know anything? This is my account and don't I have the right to know what I'm paying for or what goes on in this account?<br> I need to know when they started debiting this money, who gave them authority to do so, and when will all this be refunded back to me and how much.<br>