R99 FOR R199 😑😑

Hi ive made a laybye by Ackermans Zevenwacht mall a few months ago i always do laybyes at Ackermans stores. So i went to collect the laybye a about 3weeks ago. I then told the lady that was helping me that i have lost my orginal slip that stated what items ive purchase d. She told me it was fine that i can u slip that i made my last payment on for exchanges 🤨 so 3 of my items was too small for my son , today i went to exchange the items still having the slip that i received when i payed the balance of the items , only now the 1 pants is marked down for 90rnd and i payed 199🤔 so now they apperantly can only exchange the pants by refunding me 99 . I think its totally ridiculous as the taggs still shows 199 . How can Ackermans not have data on their computers showing that i did purchers the items as on that day the lady printed a copy of my items cause i lost and she needed one to check my items🙄🙄🙄 but now they are unable to trace sale 😡😡😡 thinking i have a 100rnd to throw down the drain its unacceptable....... bad customer service . I still have that same slipp that she used to print a copy and i asked her for copy but she told me they will exchange if needed now its a different story. 🤬🤬🤬🤬