Express visas for Dubai

For reasons, I had to book a trip to Dubai in 3 working days from now. I was assured I could process an express tourist visa within 48 hours by booking the flight through Emirates which I did. What they neglected to inform was that Emirates automated system doesn&#39;t even let you start your application if your departure is within 4 working days so I am now scrambling to get a visa. </p> <p>The internet provides me with dozens and dozens of private little businesses that state that they can - for an extra fee - process a visa anywhere between 24 and 48 hours (depending on the site). Does anybody know how effective and/or reputable these websites are and whether their claims are realistic? Thanks.