Poor hot food quality

I've been buying good quality hot food for some time at Spar Mooketse and forgot to swipe my loyalty card. In June this year, I was surprised to find that their food quality standards has dropped and I requested to know if that was their new standards via email to their head office. I was later contacted telephonically by the owner who defended the poor food quality I received in that outlet and even put that in an email to me. She, the owner invited me to visit the store anytime and she'll prove to me that food quality in her store is not an issue. In July, I stopped at the store for coffee in an anticipation of meeting her and she wasn't there. Her staff sent her a cellphone message notifying her of my presence and she called me to tell me that she was out of town and I have to make an appointment to meet her some other time. That was going to be costly to me to do so as I am 40km away from that outlet. This made me feel like she was giving me a run-around in order to frustrate me to accept the poor food standard I received from her store. In my view, she could have delegated my store visit to her capable, trusted or chief staff member rather. I alerted Spar head office about this and they told me via email that the matter was closed. I am now led to believe that customer's concerns mean nothing to Spar!!