Lewis stores, Hammanskraal - interest rates and pricing of goods

Is the following fair?

The following items was sold to one of my employees by Lewis stores in Hammanskraal.

1. Kelvinator 32L with fridge for R4,999.99 (price check ± R4,400) He paid R5,000 at a interest rate of 24% pa. Other costs included a initiation fee of R701.00; Additional charge of R500.00. Prinsipal debt was R6,201.07. At the end of his 36 month payments the fridge costed him R11,608.08.

2. Similarly he bought a Hisense 32 led TV for R4,999.99 in November 2017 with an interest rate of R23.75% pa. Total costs at the end of the term will be R13,071.60

Taking in consideration that he is a farm worker earning a little more than R3,000.

I consider this to be a total rip-off and steeling from the poor unless I am provided with an explanation that justifies the exorbitant interest rate and additional charges debited.

Thank you