You have to talk to the manager about this problem. Many people in the reaturant business have been caught over charging their customers. I wouldn't go their if they over charges me.
You must ve a bad tipper
I was over charged too but the waitress explained me that when they open the voucher with Credit card they put 25 usd to start, and you can spend just you take and the remain is returned, it was true.
Thanks! Your answer is awaiting moderation.