Bad service

Went to PEP In Roodepoort CBD to exchange a jeans that I bought for my son as it was abit to big, I only wanted to exchange the jeans for a smaller one . I told the cashier Maxie that I have misplaced the slip with attitude she says she can’t help me , I asked to speak to the manager, he says unfortunately I have to go to the Pep I bought the jeans from and ask for a re-print of the slip . I bought the jeans at the pep In lenasia .I reside In Roodepoort did they really expect me to drive to Lenasia to exchange the jeans . The manager Thami had refused to assist the worst customer service I ever received from this branch