If you don't have a clue about what you're talking about, leave it for others to answer.
The EP was never issued. You would do well to actually read the OP's post carefully.
i dont think u been rejected is cos ur result become better now.
the reason shld be, u cancelled ur EP b4 it expiry.
What 6 months contract with what company? There is no requirement to work a minimum of 6 months and as the original EP application was withdrawn with having been approved or issued, it is of nil concern.
and u applying again, after the General Election ,
i think they will be more strict on it, as well as reject those didnt fulfill the 6 month contract with company.
Rejections by MOM now usually come with an explanation (although the explanation usually leave more to question than not). You must understand one thing though, the application process is a two part process. First of all, you need to have the relevant educational qualifications (have you checked the EPEC qualifying university listings on the MOM website?). Assuming you have a suitably qualified degree, then you would not be rejected for qualifications. However, the 2nd part of the processs is out of your control. This might be a problem of the employer (as you noted, it's not the same employer originally applied through). The employer HAS to convince MOM that they need to hire a foreigner because of the nature of the position, or there are insufficient local/PR with suitable qualifications available. Additionally, if you didn't have/get an EPEC, then hiring you, as a fresher, is not likely to see you being accepted. There are heaps of local fresh graduates so it's unlikely that the company could justify it.
You also did not indicate whether the first application was approved or was just "submitted" or "pending" or "processing" before it was withdrawn. I'm assuming an AIP was never issued.
As a fresh graduate, you are going to find that getting a job in Singapore is rather difficult at the moment, if not virtually impossible. You have nothing to offer a company except a piece of paper that says you know how to take tests. But no real experience to justify hiring a foreigner.