Poor service from Vodacom - no response after a year

Upgraded my contract on 24 June 2025, a year back. To date, my three data SIM cards are still not functioning. I reported the issue telephonically when I received the SIM cards, as well as through Vodacom Online, but I have not received any feedback. I also visited a Vodacom Middelburg store in May 2026 and completed a SIM swop, however the three SIM cards still do not work. If I call the Business Vodacom call centre, the Tobi computer also cannot assist me. Each month I need to pay for a product and service that I cannot use. This is a contract agreement, yet Vodacom has not provided the expected service. As a result, I believe the contract should be cancelled. For security - not able to display cell nr