Vat and service tax on outdoor catering

Hello,

My client has availed the services of an outdoor caterer. The bill is based on per plate basis i.e. a combined amount of Rs. 425 is charged per person without any bifurcation of services and the food bill. The caterer has charged Vat of 5.3% on the bill amount and Service tax @ 6.18 % on the amount Inclusive of VAT . Isn't this wrong ? The Vat should have been charged on the food items separately and the Service tax on the service charges. How should I go about this ?