Ive paid for a year, but now my decoder turned off

In Jan this year I took a package to pay for a year and get 1 month free. Despite this my decoder was switched off on the 2nd/3rd Dec showing a E16 error. Phoned the customer care centre - 3/4 of an hour later - (long distance,peak call time) they assured me it was fixed. This happened again on the 19th - I followed the same procedure - they assured me again it was fixed. on the 24th Dec the SAME thing happened again - this time I was told that the agent needs to fix the error (Sorry, but dont you all work for the same company???). Had to go to a walk in office (excuses me but which business does not have a telephone you can call them on?) They sent email to the main office asking them to fix the error, and then they assured me that everything had been sorted. TODAY - AGAIN - the same thing happened!! AGAIN I went to the agent - to be told that main office wont fix the error, but that he would once again turn on my decoder, and try to sort it out. So now 6 HOURS later... I still have no DSTV, I have spent how much on telephone calls BUT YOU HAVE HAD THE USE OF MY MONEY FOR THE YEAR - TOTAL ***********!! JUST TURN my decoder on according to our agreement - till the 22nd JAN 2016