Hi!
Thanks for reaching out, and I'm sorry you have trouble getting the game to work.
I'll be happy to help you get the game working. What kind of setup are you trying to get the game to run on? real hardware using a flashcast like NeoSD or Darksoft? Burnt CD on Neo-Geo CD? Emulator? If yes, please tell me which emulator on which system (computer, mobile, emulation device...).
If you prefer a refund instead, I'll obviously be happy to refund you the game. I've just looked up about refund process for itch.io (It's the first time I'm encountering the case). Apparently you need to contact them through email (support@itch.io) to ask for a refund, and they'll do it.