I am sorry, you'll need the info on Croatian embassy in London, not in India:
21 Conway Street
London W1T 6BN
Phone +44 207 3872022,
Fax +44 207 3870310,
Since Croatia is not a member of Schengen agreement, you will need a separate visa application for croatia.
The visa form, regime and fees info are available on the official website of the Croatian ministry of foreign affairs (http://www.mfa.hr/M…
you do need a visa to enter Croatia for tourist purposes. You can check the visa regime on the official website of Croatian Ministry of Foreign Affairs and European Integration (http://www.mfa.hr/MVP.asp?pcpid=1615). Just select South Africa …