Telkom not cancelling my 10 Gig data account

Telkom has been deducting money from my account for a service that I cancelled on 27 November 2015. My account was upgraded, I cancelled at the branch within 2 days (within the legal waiting period) and still received a device. I was told that they will only cancel my account on receipt of the device. The device was fetched from my residence on 11/01/2016. The account is still not cancelled and the person responsible is NOT responding to my e-mails.