Trying to discontinue a service is a nightmare with Telkom

We have been trying to discontinue our LTE line since March 2022 and we had installed fibre. We have completed 3 discontinuation forms since March this year and are still being billed for a service that we no longer have. We have visited Telkom branches on 3 separate occasions and have called multiple times. We even took photos of the forms as the first time we completed the discontinuation form, Telkom said they had no record of it. I am at my wits end with Telkom. Absolutely incompetence.