Congrats, and welcome to the real world
It sucks, I know, I've been there. Try and see if you can get some short term grants, to do a bit of research for a few months or half a year, so you can develop a plan for a PhD project, maybe write a general outline article. This will improve your chances when you do find an opening somewhere, it shows you're serious about it. If that doesn't work find some job to keep you alive and just keep trying to get in. It takes determination and still you may fail, but it's not impossible.
Good luck