Terrible Service of Cancellation!!!

I requested to cancel my landline 31 July to be done 30 August. It only got seen in October and the invoices are still pulling up to now which is December. I’m getting numerous phone calls from debt collectors and I am not listed!!! This is absolute non sense because telkom are at fault and are logging me debt owing which is not true, plus I’ve got all my bank statements and invoices from telkom and I have been OVER CHARGED which is a joke because telkom are phoning me for money I’m which I do not owe, I wonder how many times I’ll need to phone telkom to get some of my money back!! I’ve had over 28 answered phone calls with sending numerous times of proof yet everyday I get phoned still, this is pathetic. You are a service yet it’s like talking to a brick wall nothing happens and nothing goes through, and what is even more pathetic you can’t deal with a physical person in store as everything has to be done over the phone, how is that efficient as the people on the phone have bad attitude and try talking over me instead of listening and understanding. Plus being told everything been sorted and to keep phoning in once a week to check the progress, what on earth kind of service is that?!? I’m immigrating to a new country so I’m trying to do the right thing to sort everything out as I’m leaving very soon, never thought I’ll still be dealing with this issue 5 months later. That’s only for my landline, now I’m trying to do it for my mobile and you guys have 21 days to contact me? I’m leaving this needs to be sorted now, I’ve tried explaining to your telephone service but they just say they cant do anything? I’m disgusted by telkom and that’s why I’m also cancelling my mobile and which I will NEVER use your services again!!