Not sure if there are any shops in India but Im from EU and I just order a grow kit from https://www.wholecelium.com/ > follow the tutorial, look at some videos how to grow, what's the process etc... and grow your own powerful magic mushrooms.
I guess it won't be that easy in india but maybe it will help. Hope you get some legit contact soon!
Also , if you are dealing with darkweb marketplaces check if they are not a phishing link. https://dark.fail/ > Here you can find online marketplaces with the actual real links. Buy from sellers with positive reviews & you should be good.Best of luck!
PS : There for sure are people growing shrooms in india you just don't have the contact yet, keep trying, keep it lowkey
I know about wholecelium, but I couldn't exactly trust it as it has low trust scores on most review sites. It does say on the page that it can deliver