I fee that all portals crawl the Web and pull the same data.

People who I know get calls really fast, no secret... Honours from the best uni s.

If the problem is even getting a call... Overhaul your cover and resume. Read up on keywords to beat the HR systems. 90% of poorly worded profiles get deleted by software. Cannot be nothing to write.. It reflects on your mindset that you have nothing to show and your boss feels you are nothing to consider.
It is absolutely morale shattering by now, but I urge you to pick yourself up and go for free resume/cover writing talks.. Every uni has it coz I frequently go to uni s in the west.. Its all free. Some even offer 1-1 consult. Some are exclusive for their students but when there's a will there's a way.

Another person posted above wrote about taking a different approach, it's true, you have nothing to lose right.

Don't wait until June.. Hiring would have slowed to a crawl.