@jerryaustralia,
this post was concerning a different topic but anyway:
Please update your RevSlider to the latest version. The problem you describe is caused by an oooold version before 4.1.4 , we are currently running on 4.6.
We are really sorry to hear that you have gone through that much trouble with your hacked server. We keep up to the current security standards and your job as user is to keep the plugin up2date (sorry to sound a little bossy here ;))
In general: Please always remember keep all your plugins, themes and your WordPress up2date to retain the best possible security for the whole system!
Cheers, TP