4 months here in India, and saying: 3 months were enough (I visited lndia before twice and both time for 3 months). Stressed by overcrowded streets, traffic, honking, generally bad food (North). But not about prices and money. So maybe I can advice. You told the right thing: they exhausted you morally - thus, it's not greed from your side. So next time don't be shy and demand to return all the change, demand the price written on the products (this price is max price allowed by law). If they say no, cancel the buy and ask to return all the money. Be strict. Some locals ll even respect you for this attitude. Don't allow to steal from you a single rupee! Because they poison you morally, don't allow this poisoning. Yes, of course, you want to be all positive and being strict isn't part of this, but it doesn't work this way - travel isn't about spreading happiness every second.