@Ravi ********
I had made a mistake in my earlier advice (that Stuart Cummings caught and messaged me about) You got stamped in on a āļ.āļ.30 stamp, that's a visa waiver entry and people from countries who get that stamp cannot extend it 30 days at the immigration office.
GO see if you can get the stamp corrected to the TR60 tourist visa 60 day entry you should have got,
Otherwise you can stay until that stamp runs out and then bounce, OR go back to the border and get it corrected