Treated Unfairly - Loyalty does not matter

My contract upgraded in 2016 and I received handset with that , In 2017 i asked for higher package and was placed on Red Premium , no handset etc received simple upgrade of contract for which I pay every month Cost is too high and i am not using the minutes/SMS's etc of the Red package , want to lower package but am informed i need to pay "penalty" ? for what ? I am still honoring the contract (more in fact) that I received handset for why should i now pay penalty - I was definitely not informed when i upgraded to the Red package that it will be a new 24 month contract , if so I would not have done it as it holds no value to me. I have been a loyal Vodacom customer for more than 20 years and have always paid my installments due , and had no desire to leave , the package I requested will still cost me a lot of money monthly but it seems that loyalty does not count and customer retention is not important as Vodacom would rather loose my support for the next 20 years for the sake of squeezing R1700 "penalty" out of me for wanting to migrate to a package that suites my needs better and enable me to stay with them , shame on you Vodacom