13 logged calls in 4 years still no improvement

I HAVE LOGGED 13 CALLS WITH VODACOM 111 REGARDING THE QUALITY OF OUR CELLPHONE COVERAGE IN WESTBROOK BEACH KZN . WE ONLY GET EDGE NOT EVEN 3G WHICH MEANS THAT MY 3G MODEM FOR MY LAPTOP IS USELESS AS WELL AS MY 3G DATA CARD IN MY TABLET BECAUSE I ONLY GET EDGE. I HAVE BEEN PROMISED OVER AND OVER AGAIN SINCE 2011 THAT THEY WILL UPGRADE OUR TOWER BUT NO lLUCK. IT SEEMS SOMEONE WITH 5 CONTRACTS AND A MONTHLY SPEND OF OVER R5000 IS NOT IMPORTANT ENOUGH FOR VODACOM. I AM ON MY WAY TO SEE WHAT MTN OFFERS ME! !!!