Kauai does not take 50c coins

I went to sandton branch and was told they don’t take 50c coins (I wanted to give R2 in 50c coins)by the manger and cashier, funny they don’t except legal tenders but seeing I buy there everyday they choose to give me the same coins back when I need change, they begged us to come back after COVID now they embarrass I am waiting for headoffice to call after I laid complaint cause they don’t give out their number but yet they want yours