Frustrating client

On the 3rd of May 2026 my aunt was given terrible service at spar supermarket sibasa. She paid double the price of 60 eggs that were on special because the manager decided to switch off the till while she was in the process of paying for eggs. When she asked while still in the shop she was told the other transaction which is fnb card will reverse which didn't happen till date. She's been to spar supermarket sibasa 2ce with no hope of help and also went to fnb bank but the bank comfirms problem lies with spar supermarket sibasa. My aunt can be contacted on 0767543727 if there's any assistance anyone in this platform can offer