Humiliation

Good Day, i am experiencing major problems with Telkom, i had 2 lines with them back in 2014/2015 one was a business line and the other a residential one, my business closed down and the line was cancelled and the invoices were paid, ame with the residential one, we moved to another house and i cancelled the line and paid the invoices, yet they kept on sending me invoices even after the line was cancelled! now they harassing other people by sending them sms's and phoning them about me still owing them money! They threatening me with legal action as well. This is not just only embarrassing, but also humiliating and i think not correct by the consumer law, and this is giving me a very bad name and bad credit rating, because they listed me with the credit bureau! Regards.