Unhappy Vodacom Customer - Bad signal on calls and internet

I have been complaining for months about my terrible signal. Nothing has been done. Now I was told to wait for months for a booster to be installed by Vodacom or to buy one myself. Why should I buy a booster because Vodacom can't provide a service? Both of my telephone lines and my internet is appalling! I need this to be sorted as soon as possible as this has been going on for almost a year. I already have to phone every second month as my data just magically disappears.