Vodacom is greedy

I'm looking for the word to describe past gatvol. The worst service by far. I want my money back. I pay R1100 for LTE internet for a 100 Mbps 2 TB internet. I wish I could say I get half of 100 Mbps of speed. For the last few months, I've gotten between 10 Mbps and 20 Mbps. I can't even stream a decent movie. I reported the matter and was informed that they will get back to me. Yeah, right. I know what the problem is. Greedy Vodacom keeps on selling without making sure there is enough infrastructure for everyone. I hereby demand my money back and a cancellation of my internet service with no penalty or Vodacom to fix their ****.