Unfortunately matric is a run of the mill thing these days. Everyone has one meaning it doesn't add much value.
Even with a degree you will struggle to find a job. It's degree + experience that counts; meaning you have to cop working for the slavers for a few months for free after graduating before you start making any money. I don't agree with this but it's a supply vs demand thing. Of course some places are doing the right thing but not all.
You can do bar tendering, pet sitting, or start your own business. Maybe someone will be nice and help you out with something meaty. Otherwise take up a trade. One valuable thing that I learned from leaving South Africa and living abroad is that SA is abound with opportunities for example, no one asks for your plumbing qualification when needing a plumber, meaning you can practically run any kind of business without being trained in any meaningful way. It may not be legal per se and may open you up to breaking lots of things, but many businesses run off the back of supervising unqualified staff with little oversight or infraction if/when something goes wrong.
i was going to suggest something similar.
attend flight school up to the point where you need to rack up hours flight time (the expensive bit).
at that point apply to air force.
your private training to that point indicates commitment and academic ability - 2 of the larger risks the airforce takes when considering candidates for piloting careers.
in the interim - waitering or barman - depends on the venue, you can make good money and the night hours wont impact flight school.