Culture being blocked?

I’ve won a culture victory so know how to get it but in current game playing as Ghandi my culture seems to be blocked. Even got the hero who gives you culture and used him up twice, almost no increase in culture (should have been huge). Am on turn 270 with 47 culture which is nuts - have theatre districts, great works, wonders. It just won’t increase. Meanwhile Babylon keeps teasing me that I don’t have any culture. Could he be secretly stealing it?? Or why is it blocked so severely this game? All ideas from you brilliant experienced players much appreciated.

 

Could you share a save that has no mods?
I am one of those experts, in particular at CV’s
Culture should be increasing if you have lots of theaters, especially if working adjacency and filling with useful things.
But I must point out, culture does not win you a CV, tourism does. So I am not sure if you are using the wrong terms and your tourism is not increasing but I am happy to help you in any way.