FALSE ADVERTISING

I received a promo voucher of 75% off any meal of R200 or more on my email and decided to place an order. When it was time to add the voucher code, which I did, it kept saying it was captured but at check-out, I realized that it didn't subtract the 75%. Since it was my first time, I proceeded with the R220 order only to pay the full amount on delivery which is something I would NEVER have done in the first place!!