Don't use them!

I paid for my license renewal through Zapper. Days later I was told that there were blocks on other vehicles.

I resolved the blocks and tried to contact Disky again. Weeks later I was told that I need to go to the licensing department to pick up the license disk.

Don't use Disky! Don't waste your money or your time.

Rather use https://online.natis.gov.za

It took me a minute to renew and pay for my disk on the Natis system. Disk was delivered a day or two later.