https://registertovote.elections.org.za/voter/specialvotes/application/submit
You can apply for a special vote to vote on a predetermined day as specified in the time table if you are a registered to vote and you can’t vote at your voting station on Election Day.
By law, you can apply for a special vote if you:
Can’t travel to your voting station because you are physically infirm, disabled or pregnant, or can’t vote at your voting station on election day.