Wimpy Pretorius street

The customer service is so bad,the moment you tell them that you have a voucher they don’t take you serious,I had the FNB voucher for a bigger,and I was told that the new system doesn’t always allow the FNB voucher,I asked if we could try and they told me that I will have to pay if it doesn’t go through. Why do I have to pay when you guys have an agreement with FNB,how is it my fault. Anyway she tried but it didn’t work,not even sure if she put the correct code because she asked for the code