> I don't know the school system in Singapore, but in the US, we have community colleges that accept everyone. Most people in your situation take a few classes at a community college to prove that they can succeed in that environment, and then try again with the university. If there are similar option in Singapore, I'd go that route.

I also am not familiar with the Singapore system, but that is my first thought as well. Also sometimes scoring high on a standardized test (if applicable in Singapore) can make up for some bad grades.