Bad Client service!!

I was due for an upgrade and I contacted their upgrade department to get myself a new phone . I was called on Sunday the 30th of April to finalize my upgrade. I was informed that my contract will be for 24months on the 31st of May I received a message stating that my contract has been extended meaning that my contract will end in September 2025 instead of June. I called their customer care line and I was informed that there's nothing they can do as I wanted the term date to be amended. I requested for the agent to escalate it but the outcome was still the same. I requested for her to put me through to their cancelation department as I was not happy with heir services she did and the guy I spoke to took my work address and said I will receive a call to confirm the cancelation as it was a Thursday he said they will call the next day (Friday ) or Monday. No call from Vodacom to confirm that I have canceled with them . Today I called and I was informed that there's no request for a cancelation meaning that the agent I spoke to didn't process it . Even now my matter hasn't been resolved . I went to The Glen shopping centre Vodacom however I was told that they can't assist because it was done online so I need to wait for the call to cancel. I want vodacom to collect their device and cancel my contract with them !!!!!!!!