Lies - Upgrade VODACOM

In Oct Vodacom phoned me. I was on 600MB 500min & 2.4GB 200Min for +- R600. Then Vodacom phone me with good news because i am a great client they are going to upgarde me to 6GB for lee thann what i am paying, wow great. In December I look at my invoice nd see that I pay almost an R1000 more. Which mean that the lady that phoned me ****. I phone Vodacom on the 3 Jan 2024, Noah said he will escalted and it must be back dated from Nov 2023 I will get an credit, and someone of Vodacom will phone in a week. I looked now NOTHING was done. I phone again ****a assist me, afer telling her this she said she will escalted this and must pay a penality of R500, i ask her to talk to a manger, after holding on fr a while she said she could not FOUND her boss. I talk to het and ask someone higher, then she said, her boss is busy, ???????? she just told me she could not found him/her???? I so fed up wth all the lies. After being a client for almost 20 years and getting this bad service.