Severely disappointed for more than 10 years

My contract had run out, and since I wanted to have a cheaper contract, I went to a nearby Vodacom shop (Vodacom Chatz). I explained that I wanted to have a cheaper contract (currently 435 pm, I wanted to have a contract advertised for 199 pm). The agent said he couldn't give me the exact contract, but could give me something with the same monthly minutes and data. He told me this would cost me 271 pm, so I agreed, When I checked on the app the next day, my new contract is now 473 PM. Vodacom doesn't allow anyone to deal with an issue over email or their pathetic AI chatbot. Vodacom has now managed to severely disappoint me for about the 5th contract renewal in a row (10 years). I'll now go out of my way to move to another service provider.