Cellphone insurance cancellation

I had a cellphone insurance for Sony Xperia at edcon. I went to Edgars active to cancel on 20 May 2015and I spoke to a consultant at the head office and he assured me that it was cancelled. To my surprise I was billed from June 2015, I got my statement in August and I called the customer care to query why I'm still billed,the lady I spoke to assured me that it was cancelled and they were going to credit me for wrong billing and I understood that. Today I got a statement, guess what I was still billed AGAIN and I called finrite and the lady said it's cancelled. I then called customer care the consultant told me that it's not cancelled and I must call finite for the credit to be passed. FINRITE CANNOT ASSIST ME EITHER. I'm using my airtime to call and still I'm getting no service at all. The biggest mistake I made was to open edcon account. What I want is to be credited for all the months that I was billed for something I cancelled and I want to close this account.<br> NO SERVICE AT EDCON AT ALL