Can't Trust Vodacom

.Absolutely sickening service received from Vodacom. It should be simple, you called me, requested me to upgrade to get better benefits as you are running a promotion. I end up paying more now, and what frustrates me the most is that I’ve asked the agent 3 times what my installment will be, and now its double that. How is that fair, now I’m phoning and being transferred from pillar to post, and still no one can help. Just adjust to what I was promised, but getting someone to even look at the issue is mission impossible. Been a client for 20+ years and I'm done, no manager calls me back, no one can take accountability and just resolve this issue for me or give me feedback.