Hurt customer

Yesterday I was at Mr price Witbank wanted to exchange my 3 cargo pants as I was from kwamhlanga passing to witbank so the manager by the of Sibiniso he refused to do the exchange for me as he told me about the policy.i did not have my till slip not aware that I don't have it with me as I am from far..my heart was bleeding that I lost the R1000 by buying the cargo pant at Mrp..I was so desperate to change because it was the theme that I was going to the ceremony..I was hurt and ****ed as the manager was chewing the gum answering me bad infront of his staff ..