People of Delhi, where do you buy your formals?

Hello! F20 I'm a final year bachelors student and I'm looking for suggestions regarding affordable and long lasting formal wear - particularly footwear.

Since Im studying international relations I have a lot of conferences/internships/meetings in general that require formal wear (semi formals or smart casuals or just strictly formal like saris and suits). l've tried a few mainstream brands but it hasn't worked out well. Since Im just a college student and formals take up most of my outfits l'd like to find something affordable and durable (summer or winter). Ive been told that Sarojini has cheap clothes but they don't last and the footwear is very hard and doesn't last much. H&M and Zara don't usually work out cause of sizing difficulties.

Any suggestions would be welcome!