What does your employer say about you leaving early? Have you suggested it to them? If they are not being helpful then I suggest to just leave? can I ask what the reasons are why you are leaving? Have they said that you get any entitlements for the year you have worked? Eg holiday pay etc. Does the labour law override the contract that you signed? Make sure the contract is valid as a lot of contracts are not worth the paper that they are written on. FOr example did you and the employer both sign the contract at the same time, was there an independent witness to sign it etc.

Good luck