Telkom ignore cancellation and keep billing

I have been trying to cancel the service that I had more than 5+ years. I followed the three easy steps uploaded the documents and got the Cancel Service Request email from Telkom, that was the 9/8/2018 10:17:00 AM and since then I've been billed every month, I also went to Telkom's website - talk to us asked the question a few times on why the service is not canceled 3 working days went by and I heard nothing from them and now the debt collectors are calling me .

To think, Telkom's billing system is so advanced after how many years they exist but still for years we as customers are complaining about the cancellation system