Vodacom signal is so unstable

I have been a customer with Vodacom since cell phones came out. They had the best signal at the time, however now days it is shocking that the signal service has become so bad. I live in Ballito and I am lucky if I have 2 bars a day. I have done everything they have said to improve signal, except for buying a booster, which I don’t have money for. Some areas have full signal and you walk down the road and you have poor to no signal. I have tried to go into the store and check my phone or ask if maintenance is being done, but my phone is fine and the stores don’t know anything about maintenance being done. How can people work from home or conduct business when the signal is so unstable. What if I have an emergency and no signal. In an age where technology is so advanced, WHY can Vodacom not do something about this?