Dishonest consultants

Bad service, not honest I was called by a consultant from vodacom and told me that as valued vodacom costumer they will be doing a migration on my contracts and I will be paying less. Monthly I am paying around R1100 and according to the consultant I was going to pay R912, to my surprise when I reciece my July statement my bill was R1800. I called vodacom on the 20th July to cancel the migrations, instead of helping me another migration was done without my knowledge by a consultant in cancelations department. I am now sent from one department to the other and nobody is willing to help to remove this migrations. I was ****med twice by vodacom consultants.