Disappointed by the retail company

I purchased a wallet at woolworths Tzaneen this year costing R399, last week the zip failed to work, the wallet is still in good condition I have visisted the store today still for report it and possibly for them to replace it woth simar one, i was told that they can only refund me R88 that what the system is saying since i dont have receipts but my question was do u except me to keep receipts of all the items i purchase and my reward card was used so it is not possible for the store to track my purchases since i dont freqeunt the store, the assistant said its possible but she failed to check it and i was told that the is out of stock and after the purchase it was put on sale

I went as far as asking them to check other stores if they have the product, it was indicated that vereeniging and OR Tambo have and they cant request it from those stores since its on sale but my argument is that i dont want to purchase it but to be replaced but they failed to even to make a attempt to contact their headoffice for advise

They was no value for money in that product i bought and i felt ****** by the company imagine R88 for R399 product as refund i am disappointed and to make matters worse i had to wait for more than 10 minutes for the Nico to come and assist me after the 1st assistant failed to explain why cant they get the product from other stores