Telkom did not close my account and also created another account without my knowledge.

In August 2022 I called Telkom to give me their settlement amount to pay and to close my account. I paid all the settlement amounts and requested that they close the account. I am now surprised to get calls from the lawyers saying I still owe them; not only did they not close the account after all the trouble of making sure a pay all monies due to them but they also created another account days later. I'm very disappointed especially have I took so many contracts with them over the years.