Bad service from the supervisor

I went to Spar Bloed to buy lunch and eggs and when I arrived at the cashier (Ronald) with my colleague Ronald took out a catalogue and suggested that I buy the eggs that was on special because they are much cheaper. I loved what he offered me it shows he’s very passionate about customer service and the lady that was with Ronald was also very friendly she offered to fetch the eggs that were on special for me. Then Ronald was looking for his supervisor to void the eggs that he tilled already I asked him where is the supervisors, can he see the person and he said yes I offered to fetch the supervisor because he went all out for me. Then when I arrived at the supervisor (Esther) I told her that Ronald needs assistance at the till because we have been standing for a very long time and she started shouting telling me that Ronald has issues why didn’t he ask Ruth. Ronald didn’t see Ruth she made a tissue and issue, I asked Esther why is she telling me all that because I’m a customer and she kept on shouting until she arrived at Ronald till and she said I must ignore stories Ronald is telling me of which he did not tell me stories he offered me and great service and that’s how the supervisor thank him. Spar Bloed they hired a wrong person to be a supervisor how can a supervisor shout at the customer and a staff member in front of everyone that’s not acceptable or is it how Spar train their supervisors to behave like this .it’s disgusting Esther should go to Customer service training she forgot about the basics