Pathetic service from Vodacom

I was contacted on 28th Oct 2024 at 08:45 am. to upgrade my contract. By an agent called Monwabisi Nzuza. Whome I told I want to upgrade in November with black friday. He then offered me a R200 discount on my package saying I can still upgrade in November. I asked him multiple times if he is sure about this and the phone recording proves it. After he assured me I won't have hassles I agreed. Few days later I wanted to upgrade with the black friday special but everyone tells me it is not possible. I told them about the agent. And what he said. Got a reference number ***. It has now been 4 days and no reply from them. I now am unable le to upgrade. Can't get the special. As well as I am stuck with a contract that will not work for me long term. Appaling service as I only listened to vodacom themselves advice. If only they'd listen to the conversation that they always say they record. They'd hear him promising me that I'd be able to upgrade to the special. I can't believe the problem they made is now mine.