Ridiculous extra fees when purchasing

What are the extra charges for? I mean im trying to buy something worth R50 excluding shipping then the final amount was R73.10. What if i had to buy something worth R10 000? Also they use the return bags from pep which are worth R5 while we pay the normal R60 for paxi. So they would take the R23 plus the extra R55 if i also paid for courier. come on guys! This is ridiculous!