Waiting for a refund since November 2017

I logged a call on 18 Sept 2017 to cancel my Telkom Mobile account, The correct paperwork was completed and e-mailed as requested by Telkom. Yet the debit went off in Oct and Nov. I called to complain and I was told that I would be refunded. I called the contact centre again on 01 Feb 2018 to follow up and I was told the case was closed due to them trying to get hold of me during Dec 2017 while I was on Holiday so the case is closed and a new case was opened. It is now 12 Feb 2018 and I am still waiting. I cannot understand why this is taking so long. this morning I called the contact centre twice but to no avail. I wonder what they would do if I stop paying my landline account to compensate for the money they owe me for the Telkom mobile devices. Telkom for me is a no go place. If I donor win in this situation, I will be closing my landline.