Telkom terrible service

I've had 6 mobile contracts with Telkom. Due to financial issues, I've attempted to cancel some of those contracts. Sibusiso failed to cancel the first requested contract ***A in May and while the number was not in use during June, I only discovered this when I called in to cancel 2 further contracts on 27 June. Again speaking to Sibusiso ***A), he proceeded to cancel the incorrect contract. Furthermore, Telkom had upgraded and increased my subscription fee on my main contract without my consent. I have spoken to multiple agents including Tembile ***A), ***A, Nontobeko (30/06/25), Mbali (Mbali04/07/2025)... all promising to investigate and revert but to date I have no resolution. In fact, my new invoice reflects yet another increased contract fee.