Vodacom doesn't care about their customers

I have been with vodacom for the last 18 + years. I've always had a fair to good signal in my house but in the last 6 months I've had little to no signal in my house. Vodacom sent a signal guy to come and inspect the signal he said that the signal is al over the place and he will suggest that I get an signal booster. 2 months later he called me to say I need to sign an indemnety form for a signal booster that Vodacom will install at my house and now 4 months later I get a cal to say that Vodacom doesn't care about me and my family and or if we have a signal either. We can cancel the contract with vodacom or we can continue to pay for a service that we cant use its our choice