poor ****py service & problem not resolved over a year!

So, for over a year now I am trying to cancel two services that we are paying for that does not exist...I have called all the departments within telkom and not one person can assist me, however if I ask for invoices for these services they can send it very quick.. these services belonged to a residential and a business which were cancelled over 8 years ago, I was scrutinizing out telkom account and found we have been debited for all these years for a non existing service! my last email I have sent to a lady at the mobile side as she said she would assist in trying to track where the debits are coming from that was the 3rd September 2019, its 10 days later and after 2 follow up emails - NO RESPONSE! Our company will be taking legal action as no one at telkom i actually interested in assisting us, very poor and ****py service