Still no answers to my problem

I have been a loyal mtn customer for many years. With two lines on my contract and one of these lines were due for an upgrade last year. And when I was due for an upgrade there was no device I was interested in at the time. Around the same period, June last year; an agent from mtn contacted me regarding upgrading my line and I told him that I was not really keen but he suggested that I take out a small data-only contract (MTNCHOICE 3gig) to use on my phone and I was still reluctant since I was not looking at having that as a 24 month contract but the agent went on to advise me very confidently that "this data-only contract will only run on a month-to-month basis and if I want to cancel it; I would only be required to give a 1 month's notice, and there would be no additional costs since there is no device attached". I was happy with this and especially the fact that this would be a month-to-month contract, and I could cancel it at any time and get something else.

A week ago I downloaded the mtn app, and I was shocked to find out that the MTNCHOICE 3gig was actually signed up for a 24-month contract and not on a month-to-month contract as the agent advised. I went to a branch to get clarity, and when I got there, they confirmed that indeed this was a 24-month contract and if I want to cancel it I would have to pay it out for its full term. I am very shocked and angry that this person outright **** to me and sold me something that was not and instead bound me to a contract I had no idea about. I need this to be rectified and this person to be reprimanded for falsely capturing the contract he sold me.