NO ONE IS WILLING TO REFUND ME

Last year July took a contract with MTN yellow mobile with a lady by the Nodumiso (what a great service I had). She was sweat and she know how to sell her product. After some few minutes some lady called to confirm everything I was speaking to Nodumiso ,She told me they are running a promotion and I will be getting a second phone which I will not pay for it. That the day my nightmare began , I tried to cancel it and I was told I have to pay for the cancellation fee as it was already activated , I protested back and forth with Yellow Mobile till a God sent by the name of Katlego for MTN intervene and Yellow noted that they made a mistake and send someone to come and collect the phone . They sent the money in October to pay MTN early cancellation fee. Since August last year till January MTN was billing me for 2 phones , I don't who is suppose to pay me between Yellow Mobile and MTN . Its so unfair to pay for something that I never used , I cant wait for next year to cancel the contract and move to another network.