Spar Acornhoek cashiers were unhelpful and condescending

Spar Acornhoek refused my RCS card, they were unhelpful and very rude despite calling RCS and confirming that they are part of the RCS network. The first cashier who was standing with other spar workers looked at me in a condescending manner and gave me stride. The second cashier seemed uninterested and didn’t even call the manager. I’d like to know why RCS said it is part of the network, if we are gonna be given attitude.