pathetic service from a manager

Friday the 14/12/2018 i paid out my lay-bye at the Ackermans store in Durban West street. On Saturday the 15/12/2018 i came back into your store again for an exchange on one of the items from that lay-bye . I made an addtional purchase on that exchange which came up to about R300. The cashier assisting me did not confirm if i would still need the original slip and i also forgot to request for it back. When i got home my daughters dress was also not fitting her and i am now back at the store for a refund on that item because there is no stock of that dress any more. I am now beinh told that i cant get my money back because i dont have the original laybye slip which the cashier took yesterday. I have bern sitting in tje store for over an hour with no assistance. The manager has total disregard of me as a customer and has failed to even to be efficient . The service at your west street store is shocking and its really sad considering the turn over your store makes with the mass market but you fail to deliver good service to them . After an hour ½ of waiting im being told that they cant find the slip from thr day befores slips of exchanges & refunds .