TELKOM ARE *******!!!!!

I am at my wits end with TELKOM. Firstly I was billed for an upgraded service I did not request for over 4 months, and no effort has been made to return my money which I now feel they stole! I then cancelled my current service with them in March 2020 (Cancellation Reference number: ***A) this reference number and message stating I will be receiving my final bill was given to me on the 23rd March 2020. To date I am still being billed for a service that I cancelled and no longer use months ago. The TELKOM Customer Portal does not work, I tried logging a dispute on more than one occasion only to be told that there is an issue and I was given yet another Reference Number: S558P. In these economic times it's really pathetic that such a large company can conduct business in such an unprofessional manner and to openly cheat their customers from their hard earned money. Why has the authorities not looked into their shady business practises?