In happy customer

I am fed up with Pep stores Evaton Mall. I received an email stating that i can go an collect my refund and I should bring an ID as proof of which I did. A cashier by the name of Agnes asked me to give her a copy of my ID and I tried showing and explaing to her that their message was for me to bring my Id document not a copy but instead she made me feel like I am mad. She called her manager who said I must go and make a copy with my own money and when I told them I am calling their head office that cashier said I must move and make my call from another side meaning my query was nonsense. I used my petrol to go to that store and its not for the first time receiving that unpleasant treatment. It does not matter how much is my refund the fact remains it belongs to me. Pep store should take their staff for customer care trading cauz it's a no no for me