Vodacom doesn't cancel contracts and NO communication from a communication network provider

How is this for great service from Vodacom: I canceled my wifi contract in December 2021; the last debit order to go off on 01 January 2022 because the contract only came to an end on 04 January 2022. Come February, they took money from my account- long story short- I had to reverse 3 debit orders and call them to tell them I canceled the contract last year. About a month later HP Attorneys start calling me about the collection of debt. It is now October - I have sent an affidavit, I've sent emails, and NO FEEDBACK! Just debt collectors who keep on phoning me AND I now have this account on my credit record. USELESS. How long am I supposed to wait for Vodacom and the debt collectors to do their jobs????? I sent the affidavit as requested. I did everything from my side. You just have to find a recording AND REMOVE THIS FROM MY CREDIT RECORD.

Already in contact with the DOA and Experian.