Is there any honest caterer in Chennai?

In one of the Hindu marriages recently attended by me, the caterer charged the party a whopping 3 lacs just because there is no clue as to how many actually took tiffin/meals. The actual charges could be only around 2 lacs! The party knows that the caterer has charged 35% more, but can't prove. The caterer's men numbering 30 and the marriage hall's staff numbering 20, who were not invited, also took the tiffin/meals at the cost of the marriage party. Is there any solution to this plundering? Knowledgeable and experienced friends may share their views.