Dstv price lock

Dearpeter iam a existing customer of multichoice with a dstv compact plus.now i wanted to get extra decoder of explora2,then i apply for pricelock on the same package and my application was approved.but the problem arises when the decoder was delivered.it includes the installation and plus dish and smart LNB.so the price was R119 for everything.so i did not want an installation as i was having a dish and smart LNB.i tried to inform customer service about this mess but no one ever assisted me.during september thats were the application started and the decoder of explora 2 arrived two days before month end of september and i inform them to activate my new explora2,then they started to deduct the amount of 357 for three months.remember they never done the installation but iam paying something that they never installed.even this december they are going to deduct the payment plan of 119.i tried my best to inform multichoice about the payment plan but they kept on saying they will esscalate this to the relevent department.the time is going and they kept deducting the money.they suppossed to get only the money for the explora not for installation.they knew very well that they never send the installer.worried man.Mr Kj phu****si id ********** 454089