Bad customer service

Last year in December I did a laybye at their Jabulani Mall branch. I paid R400 towards the laybye and the balance was R835 something. I lost the receipt of that laybye which was to expire in March. I went there last Saturday to Pay off the Remaining balance and was told that they cannot see the laybye on their systems. The lady then called her Superior who said the transaction was probably lost with the old system. I enquired about the R400 I paid and was told there was nothing they could do, I should come back when it's less busy so they can check for me. They spoke to one another and looked as though they were hiding something so I just told them I would come back. I want my money back and was hoping they would give me the clothes even though the laybye expired. I then request for Ackermans to explain to me how a customer forfeits their money because for years I have been laybuying and not even once did I encounter such disastrous customer service and I would like to be refunded back my R400 that is if your consultants have not taken it for themselves