Free data card still working after Unlimited ADSL and Landline cancellation.

I called the call centre to cancel my ADSL (on Unlimited home) and landline on 15 Jan, and I was told all services will be cancelled on 15 Feb. I had doubt initially that the services will be cancelled (read so many stories from people who struggles to cancel Telkom services) so I called the call center twice in Jan to confirm, I was told 15 Feb is the date. Surprisingly the ADSL and landline were cancelled (or at least unusable) on 15 Feb. But the free data card came with the package (unlimited home) is still working until now. I called the call centre again on 18 Feb to check. The guy said the cancellation is stuck on the system (I mean, how can a cancellation be stuck?). So he said he sent through a request again. And there is no time frame of how soon it will be done. Telkom, why is it so difficult to cancel a service?? Also Telkom call centre cannot tell me when the last invoice will be, very difficult to know?