contract repudiation

[Graham]

Hi fellows,

I have signed a contract with a company in Singapore, but I have not strated to work yet cause I am still waiting for my EP. Recently I got another better job offer in another country. Certainly I will take the better one. Can I just tell the HR that I am not interested in that position. I have never been to Singapore and dont know the rules over there. Is there something I should be aware of if I want to break the Singapore contract like this?

May I have your valubale suggestions?

Cheers!