MRP 100 Plus ****??

Earlier this year I received a call from an MRP call centre rep. They advised that I would receive a sim card which will be loaded free of charge. I was not really checking my account, but noticed that my account is not going down. This is when I discovered that I am paying R100 pm for MRP 100 Plus contract. I remember distinctly asking if it is a contract and being advised that it is not, but rather a reward for being a good customer. I feel done in as a customer. Very upset with MRP. Please reverse all my payments as I am not even using the service and this was false "advertising". I feel that all my monies should be reversed and put as payment on my account.