Bad service and wrong pricing

I had a very bad service at roots butcher in Brits on the 31st of May 2026.My sister snd I went to go buy some groceries there and when we got to the fruits and vegetables fridge there was sweet corn that was priced for 17.99.We each took two packs each and when we got to the till they said that is not the original price for it.My sister said she cant agree to paying what was not the initial price of the product.They agreed to let her take it with the lessor amount on the sweet corn.When it was my turn to pay they refused and said they need to take it back and correct it.Is this not deceptive advertising??? I got so angry than they said there is a staff memeber who put the wrong price therefore she should be the one paying the difference and all that they wanted to do in front of the customer.I refused because,the employee might have made a mistake but why not address them after the customer has left the store and take it off her salary.Some white lady with long hair she has a pony she was so so rude to me and I think thats the manager in there.She said that im full of drama I even told her its not my fault that their prices are wrong she said to me why didnt I read first of what's being written there is that my responsibility???I mean if they couldn't see the mistake how do they expect me to see the mistake??is that my responsibility because,my only interest was me taking the sweet corn and for that amout that was put there.The white lady kept on being rude and my reason for saying white is because there is only white managers in there.After that the lady who was assisting me also made a mistake she tilled something for 100 twice and after that there was also chicken burgers I wanted. I saw the price as 49.99 than on the till it says 85 or 80 something like that I told her thats not what I saw I went to the back when we got there ,there was not even a price for those chicken burgers than on our way to the back the white manager kept making a noise and I told her to stop talking to me like that because she kept on saying shes not scared of me and that there is nothing she will do to me I told her im also not scared of her and if she wants a piece of me we should go outside she kept making all that noise im front of staff and other customers.I am very frustrated because she is not a manager she is a boss very rude and boss and I go to roots for groceries and meat every week now me going back there with such bad,rude and horrible manager is annoying the till lady's name is Protia she tried calming me down and she eas very polite as for her manager a rude women.I even told her im going to report her and she said she doesn't care.I want to take this further to there customer care because,I refuse to be treated like a piece of trash.