Wrongly rung up items on bill

The waitress duplicates orders or mixes the orders up and there are few waiters that attended to our table, they still put stuff on the bill which we have already settled. But they insisted they gave us these things and when we pointed the stuffs out then one waitress will agree and the other waitress disagrees they were both very confused and the other guys that was also serving us said all is correct and settled, then the manager said James said no we have to pay, we had to show him what we bought and what we didn’t and some waitress agreed and some didn’t like Sarah she was very confused she knows she messed up our bill and they didn’t want to hear it, we settled the bill and exited the venue.