Shanon is a rude manager

I always visit Babobab wonderboom and order the same thing because I love it however I visited the restaurant last night and ordered the same thing as per usual however it tasted off so my waiter took it back to the kitchen. The manager by the name of Shannon then came with attitude to ask me why I returned the food and I tried to explain then he told me how the use the same griller all the time. I explained that just because we use the same person it doesn’t mean they are immune to error, mistake can happen regardless of how long you’ve done sometimes but he had a very bad attitude and I just told him to just leave the order because he was giving unprofessional bad service