Signed up for cellphone contract without my permi

I called the Edgars call center and looked at my statement and saw I am being charged for products without my concent I was never called to join and mobile sms service nor the mobile content services I'm being charged for. spoke to one of your consultant and she informed me I had been charged for this account since July 2014. I'm not even using or in possession of that cellphone number but without fail, I was being debited for an MTN top up airtime amount. Was told I'd be called in 24 hours after my call but with no response. . If Edgars can't provide me with a voice recording that says I siged up or want to join or have that product, they will hear from my lawyer. Not a threat but what will become a reality for them. I need my refund ASAP