Young, educated people in Indian urban centers are essentially a demographic that
doesn't need to be targeted because they're almost always sensible enough. Take away any of those three conditions, and the need for proper education among that group becomes harder -- as does the difficulty of reaching, convincing, and actually implementing any sustainable "culture of contraceptive use" among them.
It's what you'd expect where adults, especially lower- or lower-middle-class adult women, will almost never talk about sex, resorting to grown-up versions of "wee-wee", or oblique "that time of the month"-ish circumlocutions, if they do at all.
India also has a pretty grim history of adult men being forced to undergo (often botched) sterilization during the infamous Emergency declaration in around 1977, with a significant number of casualties. This kind of history obviously muddies the waters (as if the almost-institutional cultural reluctance to engage with these matters wasn't enough).
https://en.wikipedia.org/wiki/Compulsory_sterilization#India
https://en.wikipedia.org/wiki/The_Emergency_(India)#Forced_s...
I must say, though, that there are more TV ads than ever, and even the occasional billboard (which residents' unions will often try to shutter on the grounds of "public morality") for condoms or contraceptive pills. AFAIK (and it's no wonder why) the government doesn't advertise morning-after pills at all, but Indian Big Pharma does (and, again, I doubt how many of the people who'd actually benefit from the ads see them or act upon the information). Unlike the situation in the US, here the driver is some kind of ill-defined "decency" rather than the threat of swift retaliation from an enraged petty deity: not that it makes much of a difference.