Basically the argument is, government taxes and import duties increases costs of importing therefore those costs is forwarded to the customer. Whereas direct shopping and shipping platforms like Shein and Temu doesn't face the same costs (or skirts by through loopholes and illegality).
Government's argument for these stringent added costs for thing that we do not even produce domestically is capital exchange controls. Then the ANC's policies of middle man economics (aka BEE) exacerbates the cost of living even further.
So instead of competitive prices for goods, we pay exorbitant premiums on every item we buy.
Ultimately in such a disfunctional system, it is your duty as a consumer to support the circumventing of these Draconian rules, so if government tries to stop Temu or Shein from selling at these prices. Vote for a better more caring government.