Service tax

I consumed eatables worth Rs1050 at a restaurant. The bill indicated addition of 12.50% VAT on Rs 1050 and also 5.80% GvStax on Rs 1050. I therefore paid Rs1242 for consuming Rs1050 worth eatables. As per my understanding service tax is to be charged only on the services provided by the restaurant . What is the correct position on charging of service tax by the restaurants and where can one report over charging by them?