I cannot get 3g or Lte signal at my house

Hello.<br> I live in meerensee richards bay and can only get edge signal at my house.<br> If I need to do anything that requires data I am forced to use the wifi at home. <br> (This email included)<br> I have run a signal tester and the best signal I can get is -91dBm. Well lower than the LTD / 4G speed that I get at work. <br> Please can you do something to improve speed. <br> The main concern I have is that during loadshedding we are forced to use vodacom for data. And then signal is too poor for Internet, voip calls, etc