Bad service

I wanted to buy a kitchen unit at this store, then i sent my sister to the store to pay on the 5th Jan 2019 R4000. She paid then a week later i was told that the unit i wanted wasn't available. So i asked for a refund, up to this day im waiting, they send me from pillar to post. The store manager Pertunia the rudest and unprofessional person ever, instead of hearing me out she hang up on me. I want my ****** money back.