Dishonest check your bills

On the 30th of December, I came through to Dros Kyalami with my family. I was served by a waitress named Sisanda or something to that effect, she served us well and have no issues with that however when it was time to pay my bill was R1101.90 I added a R100 tip to that and my total was supposed to be R1201.90 but I realized the next day when I went through my transactions that I was actually charged R1301.90 . My husband also gave her a R100 cash tip.

This is really dishonest, and I have sent them an email but didn't even get an apology