Bad service

We've never had issues and always had great signal, until yesterday. Now all of a sudden the signal is low and speed almost non existent moved the router around but still no luck. Asked a simple question whether Cape Town is experiencing any signal issues but was told they cannot answer me without my step brother's details. It's a simple yes or no question? He had to contact them yesterday and they told him it's "quick maintenance" being done. Yet the issue still persists up until now. Terrible customer service, cannot answer simple questions.