Vodafone India — false promise given by the agents

I was told that i will be on 299 plan for unlimited calls local n std, 30 gb 4g data etc, by a sales agent, this was when i was with aitel, this was the offer given to me to move to vodafone, but m on 499 plan without any information, when m calling customer services they are not giving me a resolution, false promises provided again and again, they told they will rectify this issue withing 24 hrs from 10th march, but there is nothing, vodafone people put me on hold and hang up, and last time when i wanted to talk to a supervisor they kept on transferring my call to different agents telling me that its a supervisor speaking, i really wanna go back to a different provider, but until i complete 3 months i wont be able to go to any other service providers, anyway m hoping to get a resolution on this asap.