I thought I updated this, but I guess I didn't so here it goes....
After my unfortunate experience, the manager messaged me and left me his contact information. When I contacted him, he apologized for the inconvenience and wanted more details. He explained that the waiter was new and promised to search for my receipt to review the charges. It took him about two days but he found my receipt and issued me a partial refund for the items I was overcharged for.
There was nothing he could do about my experience while it happened, because he was unaware of the situation, but he did what he could to rectify the situation.
What more could I ask for?