Overcharged and ****** by Telkom once again

Since inception of my Fibre account with Telkom roughly 4 years ago i have been facing issues and have contacted the call centre multiple times regarding this. I have been overcharged multiple times and yet Telkom does not correct it nor refund me the extra charges. Now after an agents said she will fix it i have 2 fibre lines active on my account and this circus expects me to pay both. I have been in contact with management who has also been utterly useless in just passing the buck. I settled the account once again this month because we cannot be without internet as we all work from home. I want what is due to me otherwise TELKOM you are more than welcome to remove your **** and i will go to a provider who will provide me with a service and does not ***** my money!