Poor customer service

I was at Jam clothing store at Lovedale street Johannesburg CBD .I saw badysuits buy two for R85 pick two go to the till point to pay .The cashier (Madikalle)told me its 120 not R85 i told her that its written buy two for R85 so i want it with the price that i was written there.she told me its not there mistake.she call her Senior Manager (Sibongile) She come with a stink Attitude she was not even wearing a mask she told me its not her mistake the mistake its for the person who was michardising which the lady its on leave so she can't help me .she went back to the office leaving me standing here looking like a fool .Even when they call a Training Manager (Sibusiso) he did help he keep on saying he sorry i need to understand its not there mistake i ask him who mistake is it of its not yours . The customer service its very poor i dont know how did they get the job if they cant handle customer service. Am not happy at all course i went to the store loving those bodysuit