Contract Cancellation Requests ignored

I had a tracking unit from Altech which gave me problems, which I reported and despite requests to have it sorted, this waws never done. I eventually switched it off and requested that it be cancelled in 2013. I was informed that I would have to pay for termination fees by Shamilah Saatarien, I requested a copy of the recording for this call...but this was the last I heard from Shamilah. So I kept paying even though I wasn't using the unit (while with another tracking company).

After the contract with them ended (24 months), I requested for my contract to be cancelled. I was taken from pillar to post both via emails and telephonically until I eventually got a response from Natasha Petersen (Brand Ambassador), indicating that someone from Legal will contact me. This never happened and they produced another statement. This was now in April 2016. I got an calls and emails in August 2016 from NuDebt Management (Pty) Ltd(collection agency) regarding overdue fees. I then tried calling (no answer), emailing Natasha Peterson and the cancellations department (no response)...until I eventually made an arrangement to pay as I was getting all these calls from the collections agency. I paid over 3 months and once I had done so (proof of payments still exist), no further correspondence from the agent (Lucia Memela) was received despite my follow ups. Now it's 2017 and I'm still getting calls, this time from CreditWorx, who claim that I still owe Altech. Again I have tried to contact Altech but I am yet to receive any form of response from them regarding this account. I always tell the agents that I will not pay until I get a written commitment regarding the closure of my account, and I keep getting the "Let me talk to my manager and get back to you". This is the 4th agent this year and none of them ever get back to me. Altech is one of the worst service providers I've ever come across.