FOSCHINI mislead me

I was at foschini in Parow and I saw navy knitwear that was on 30% the white writen that and when i went to the till they say it was on the 20 the date is the who would look for a date when the is a speacila. I was mislead and the lazyness of the not to take down the discount when its over. They refuse to give me with that 30% my gome to try that all to found its not 30% because they did not do the job right to take down the discount.