Clicks and their Tricks

Okay so today we went to clicks Castle Walk. The special says 2 for R100 for 24 Omo auto capsules. So I bought 2 specials which was supposed to cost me R200 for 4 containers.. They charged me R280 instead of R200 for the 2 specials. I asked the manager to correct this and his only response to me was " How can I help for something that the system does? If the system says it is R280 it is R280" He was so rude and completely ruined my day. Not only did Clicks ***** from me today but the manager really went out of his way to humiliate us. I will never support clicks castle walk ever again as this is not the first time I have experienced this.