Worst customer service from a cashier.

A cashier named Ntombenhle @ Fontana SPAR Berea gave me the worst service ever for merely asking for a cash back while paying for my groceries. She went as far as walking away and returning back without her name tag to continue arguing with me . She claimed to have no cash in her till and told me to go queue again on another till instead of asking from her other colleagues to assist as usual. The level of service was shocking as she went as far as making a noise in front of other customers instead of immediately apologizing and finding a solution she rather said I’m full of ****.