Lack of honesty and integrity from store management

I went to the Sandton City YDE and purchased two pairs of shoes, they both marked at 50% less the original price . When I got to the till , I was assisted by the store manager , who charged me the original price , and when I asked her about the 50% SALE , she said both shoes are not 50% less, and when I asked about the 50 % marked down price she told me its a mistake and the shoes are packed inside the wrong boxes. But the all the other same shoes were in the similar boxes and one lady on the floor confirmed that they are 50% less. But what made me very suspicious and left me very disappointed and shocked , was that she then privately removed the 50% red sticker on both boxes and charged me the normal price. I was in a rush and needed the shoes desperately , therefore I paid whatever amount she asked me to pay, however I left the shop very unhappy .

I then decided to go to The Glen Mall to check their prices , to my surprise, both shoes were in similar boxes and were both marked down to 50% , with the same red stickers that the manager in Sandton removed privately . I then asked aone gentleman to check the prices for me on both pairs , he confirmed both prices to be 50% less and confirmed that they are both packaged in the correct boxes. I then told him about what happened in Sandton , and he was very helpful , but unfortunately he could not help me much. He then referred me to the manager , who was unwelcoming , had a serious face that is unwilling to assist. When I told him what happened ,she told me straight to my face to take the matter back in Sandton were it happened. I had to beg and ask him to call the Sandton store because it was going to be a huge inconvenience for me to drive back to Sandton, and that still did not help . I honestly do not understand why she is placed in that position because she lacks management s****s, I am a manager myself in a customer service environment and I know that you don't treat customers like no body's , you try to help them where you can . She lacks people s****s , even the way she communicates with her staff was so disturbing . I walked out of the shop unassisted , she told me to go back to Sandton. I still do not understand , isn't YDE the same company, cannot I not get assistance in any YDE , especially about an issue like this ? A manager wasn't honest about the pricing , cant she as a manager too at least try to rectify the matter for the same of the business and the image of the company , did she really had to make the matter worse by treating me like I am a nobody ?

I need urgent assistance with this matter please , I cannot be wasting my time and money driving around all these YDE shops due to a Managers lack of honesty and integrity.