Does anyone know when/how often South African Airways release additional Velocity Reward seats?

Does anyone know when/how often South African Airways release additional Velocity reward seats on flights from JNB to PER? I have an award flight booked that I would like to change but it is subject to availability. Are there any other tricks to being able to secure a change to an award booking?

Hey lackey - I’d suggest signing up to a reward seat monitoring service like Awardnexus.com or Expertflyer.com. Both are paid services, but the cost is nothing if you get an alert that a seat does become available and you can tweak your booking accordingly.