Suspended account bill payment

I am so disappointed with the service ive been receiving from Telkom. My router contract ended last year in October 2021. Ive been calling them and asking them to end it, and everytime i was given different reference number as proof that i called to end the contract but until today(15 June 2022) nothing has been done. So i stopped the debit order because clearly they cant do their job and 3 months ago they suspended my account and now they expecting me to pay a bill for a suspended account. How crazy is that.