Consumer fraud – banquet advance refund & deficiency of service

You can approach the District Consumer Redressal Commission for the deficiency of service if a banquet hall retains your advance, though success depends on your cancellation timing.

If you have substantial proof for the payment made to the banquet hall, you may first issue a legal notice demanding the refund of the amount paid, failing which you may proceed either through consumer redressal commission or through civil court for recovery of your money. You may search for a lawyer locally or one from this website too

Proof of payment to the Banquet hall has to be crucial in processing the consumer complaint before appropriate (jurisdictioal) Consumer Disputes Redressal Ccommission.

It would be better to show relevant documents and seek professional advise of a local prudent lawyer. 

Yes,it amounts deficiency in services and unfare trade practice of Hotel, issue legal notice to Hotel and demand refund of advance money paid to them failing which you may file complaint before District Consumer Commission against Hotel and claim money paid as advance and compensation towards mental and physical agony.