Pathetic Services

i have taken a dpp contract with an explorer now for two months from day one i have received problems,when i called multichoice they advised that the installer must come sort it out. The INSTALLER IS AN ACREDITABLE INSTALLER SENT BY MULTICHOICE TO INSTALL.i called again two weeks back as all my hd channels are scrambling i have been promised SINCE TWO WEEKS THAT INSTALLER WILL COME SORT IT OUT , MY ORIGINAL INSTALLER CAME OUT AND SAID ITS WAS OK NOT EVEN 2 HOURS PASSED AND I AM HAVING THE SAME PROBLEM I CALLED AGAIN 5 TIMES AFTER THAT THEY PROMISED TO SEND ANOTHER INSTALLER UNTIL NOW NO ONE CAME AN I AM PAYING FULL AMOUNT AND RECEIVING NO CHANNELS FOR THAT