I am honestly not happy

I was in Sam Ntuli mall katlehong...I had a very bad experience the manager there was so rude I was there to purchase using my gift vouchers of which I was given for a birthday present...he literally denied me to use them he was even shouting at me Infront of other customers I felt like a fool he was so rude I couldn't buy my son's boots because of him he was busy exchanging words with me.. I was so not treated well I am not happy with his service even the cashier's were rude I guess they have learned from him cause he needs to lead by example....I really hate Mr price Sam Ntuli mall in katlehong