Scary service

I can't even put a zero rating so I'm forced to put a one star. I ordered from Waterloo Debonairs. I added an instruction to add a mayo base. The lady at the store calls me to scold me, said I shouldn't just add what I want and do my own thing. I apologised as I didn't want her to do anything the food. She said this instruction is extra, I said I didn't know, can I cancel the order. She said she will do it this time next time don't do it again. Scary terrible customer service