Harassment from MBD

These people are harassing me for over a year.

I had an mtn contract which costed me R500 a month was coming to the end date so I called before the time to cancel it and was told to call back after the end date.

When I called back after they transferred me to the cancelations department and I was on hold for an hour with nobody assisting me. I tried calling every day and it was the same story.

I tried going to the nearest mtn branch and they couldn't help me either. I eventually got an email address where I requested a cancelation and they rep**** confirming my details which I did and then no response.

That R500 monthly payment turned into R3000 and I still couldn't cancel, after about 3 months I had MBD calling me saying I owe R11,000 to which I responded and said it's not my fault it's impossible to stop a contract on the end date. They asked me for proof that I tried to cancel and I sent them all the emails and told them their calls are recorded so they can even check the recorded line for how much times I tried to cancel the contract on time.

Mtn has not contacted me since and removed the account from my credit history however it's almost 2 years later and MBD are still calling me saying I owe MTN money.

Everytime I explain my whole story then the caller either hangs up the line or says they will get a manager to call me the next morning. Today they called again and when I asked where is the manager the lady said there is no manager that can call me.

I asked her what's the point of me telling the same story again and then she will just say something to get me off the phone and next week I will get the same call again.

I then mentioned that they keep harassing me with this nonsense and she got upset and asked if I'm calling her job nonsense so I hung up.

I really have no idea how to proceed but this really is harassment and I am fed up of wasting my breath repeating the same story over and over.