Retention stress

I have been a vodacom subscriber for over 12 years, a vodacom fibre user since 2021, I moved from Bloemfontein to Jeffreys Bay in December 2023, I called to cancel my Fibre line in December and they assured me it was cancelled. The premium kept going off even though I was not using the account at all as I no longer lived at that address. I kept phoning in as the Vodacom retail shops informed me they cannot assist with Fibre queries at all. I have been trying to call Vodacom to cancel or transfer the fibre line as I paid R700 monthly for a line I did not use. No Luck, every single time they would transfer me to cancellations/retentions and then they told me the system is down and they would call me back asap, this never happened, not even to this day. It has been 6 x months of paying for a service that was not in use and the utter incompetence of the call centre staff now cost me over R4000 for NOTHING, and I cannot avoid the payment as I have my cell phone line also with Vodacom and this would affect my contracts. I am so frustrated. This is an outrage to say the least.