Rude and disrespectful

A week ago I bought my son a pair of jeans at Edgars when he tried it on it was too big I went and got him a new one before returning the other one. So today I decided to return it and request for a refund. I have never been so disrespected and insulted as a customer a cashier by the name Lydia Makgati that is what is written on my receipt she was talking about how she doesn't want to assist anyone who has come for a refund because black Friday is now finished people will be annoying when they realised that now they don't have money, mind you I am standing there and she is talking all this *******. It was so unprofessional the supervisor is standing there because she had to authorise my refund hearing all of this and not calling her to order. Train your staff to respect customers there are some things that shouldn't be said in front of customers really.