It sounds like you've got a few different things going on with your public relations company and online magazine.
As for getting clients for your PR company, have you tried networking with other professionals in your industry? Attending events and conferences, or even just reaching out to people on LinkedIn, could potentially lead to new clients. If you find some potential prospects, you can even check their credibility using some online resources like https://illinois.recordspage.org/ (if they're from Illinois) to check their employment history and how they could help you in your projects. You could also consider offering a discount or referral bonus to current clients who refer new business to you.