HUGGIES GOLD

I am so disappointed in dis-chem. They advertised Huggies Gold for R179 buy one get one free online and I took my last money that was intended for my baby diaper and bought them online and opted to collect in store the following day as I knew the diapers I currently had will last me until the next day only to be told the following day that it was a " system error". that time they took my last money. This is so inconsiderate and unprofessional as they honored the sale on some of their customers but they refuse to do the same on my order. how do you expect me to cope without the diapers while you're having my last money in your account but still refuse to honor the sale? if indeed.