An update for South African members: the South African embassy is issuing "unable to travel due to COVID-19" letters, but you can't email the embassy email address. You need to phone the embassy and the person who answers will give you their email address to send all documentation to.
TLDR : Answer Summary
South African members are advised that the embassy is issuing 'unable to travel due to COVID-19' letters. However, to get the necessary email address for submissions, individuals must call the embassy directly, as they cannot contact the embassy via email.