Pathetic managing

My husband and I often take our toddler on a Saturday morning for breakfast to the spur in broadacres. We used to get good service. Whilst enjoying our morning and in the middle of our breakfast A white female manager politely asks us hows our meal then pulls out a bill from a 21st October and asks us if we paid for our meal, on that night we went for the spur birthday special and spur was choked busy. We looked at the bill it was the right bill. She **** to us stating her wait or named Ayanda had to pay for our bill because we apparently ran off without paying. Luckily my husband found his bank statement on his cellphone and proved this to her. She had the right bill and the name of the wait, she could have check her books first. She should have asked us as we were leaving spur and not embarrass us in the middle of our meal. She had no etiquette in her approach to ask us in the middle of our meal she made me feel embarrassed. After my husband showed her our bank statement she did not come back to me to apologize in any way. I don't want spurs free meal. She needs to learn how and when is the right time to approach customers especially when with embarrassing questions!!! I dont want a freebie but I expect that women to apologize to me for her cheap ways!!!