Dishonest

After I have placed an order while there was funds in my account, I got an email saying that my payment did not go through. I then spoke to the so called manager Coswill Ruiters who told me that the voucher I used was invalid. I have proof that the voucher I used was valid and that my order went through. Zando is *********!!! I even got a order number. I was then told that the issue will go through to the finance department and they will re-issue the voucher for me, but this will unfortunately take up to 24 hours and guess what..... By then the 20% discount across the website will be over.