Telkom Cancelled Successfully - now why am I getting a bill?

I have been trying to cancel Telkom since December 2019. I have 2 successful cancellation confirmations. As I have app**** twice now on the telkom app to cancel my services. However, I have once again received a bill from telkom. With interest accruing as well. I guess I’m about to be blacklisted shortly for an account that I have confirmation in writing has been cancelled. What is up with this crony organization.