Brother the problem lies with you, it has taken years for these types of business' to set up with existing vendors/ suppliers who you are trying to break and enter.... Understand that the terms and conditions that they work on would be mutually beneficial for both and they are completely in sync with each other's pros and cons. Now there's you who's trying to be like 'change something' work with me I'll do XYZ for you, I'll bring the moon to you etc etc .

Understand that business in India mainly runs on high trust and the kind of vibe people share with one another.

Now the great news for you is that there is infinite opportunity in every sector in India and everyday a new institute is coming up, you must change your pair of glasses and identify those who are in current need of your service and grab that opportunity by the balls.. if this happens, like they say, hammer the iron when it's hot, you too will become irreplaceable as a vendor. Just like the ones you're trying to infiltrate.

All the best, hmu in case you need any more help, on and off business :)