Account closed but still being charged

I am hoping someone from Telkom can please, please, please help me, We terminated our account at the end of June 2014. The account was closed and all bills were paid. The number was transferred to the new occupants of our house. Telkom still hold our deposit of 700 rand and are still debitting our account each month for around 140 rand for an account we do not have (we do not have any Telkom accounts). I have written, emailed and called over the last 15 months. Each time the person i speak to promises it will be sorted. Please can someone resolve this for me. I now am overseas but can be contacted by email on [Email Removed] <br> Thank you.