Makro taking customers for big rides

Where in makro centurion and cat food priced at R 144 for 4 kg Whispers Took 2 packs and when I got to till the rang it through but the price on till where R 326 told her about the mistake and showed her the barcode paper decided to take 2 more When we complained about the price the supervisor call the guy Gilbert and he decided that I can only have 1 at the advertised price and pay full price for the other 3 He the called another Manger Charles and he had a chat with me and said the best he can do is cost price plus vat R 300 per item I then said he can keep the payment till later as I will put it on social media He mentioned that I must go ahead What do I stand to do Normaly the price you see is the price you pay also confirmed by the till operater and supervisor

Please help