Board Thread:Questions and Answers/@comment-31118942-20170507222548/@comment-749631-20170508104644

You can also try to register your card via DMM Game Player, which is a software provided by DMM for Windows platform and is reported to be accept more cards than the browser webpage.

Also, how about try to use other payment gates available like Rakuten? But I don't know could that work in Turkey.

Otherwise, bitcoin would be your fallback. I would not recommend DMM or bitcash game point cards as sellers usually sell them at a premium and then if sellers sell cards that are obtained illegally then they could lead to account blockage. But you can also try that if you have a trustable game card reseller